Harris, J.
The mode of proceeding upon a writ of error, in a criminal case, is prescribed and governed by the provisions of the Revised Statutes relating to writs of error on judgments and certioraris in criminal cases. (2 R. S., 739.) The clerk is required, upon the writ being filed, to make a return thereto, and the contents of this return are specified. It must contain “ a transcript of the indictment, bill of exceptions and judgment of the court, certified by the clerk thereof.” The court of review is required, without assignment of error or joinder in error, to proceed on the return and render judgment upon the record before them. (2 R. S., 741, §§ 20, 23.) The record before the court contains the indictment and bill of exceptions, together with the judgment of the court below. Upon this record the court of review is required to render judgment. It must, therefore, be confined to the examination of such errors as appear upon the face of the indictment or in the bill of exceptions. Other errors must be corrected in the court where the trial is had. If any error or irregularity has occurred in the organization of the grand jury, the objection [291] should be taken upon a motion to quash the indictment, or perhaps by plea. After pleading in bar to the charge, it would be too late to raise the question. (The People v. Robinson, 2 Park. Cr. R., 308, and cases there cited.) If any error or irregularity has intervened in summoning or impanneling the petit jury, the defendant, if he would avail himself of the objection, unless he can present the question in the form of an exception to some decision upon the trial, must bring it before the court upon a motion for a new trial. He cannot make it a ground of reversing the judgment upon error.
Before the adoption of the Revised Statutes, the practice upon bringing error in criminal cases was similar to that in civil actions. The plaintiff in error, if he relied upon any error which did not appear upon the face of the record, might, in a special assignment of errors, allege diminution and pray for a certiorari. (Pelletreau v. Jackson, 7 Wend., 478; Lambert v. The People, 7 Cow., 103.) Upon the revision, this practice was retained in civil cases (2 R. S., 599, § 45), but, as we have seen, it was no longer applicable to criminal cases.
In McGuire v. The People (2 Park. Cr. R., 148), the plaintiff in error, after a general assignment of errors, made a special assignment and alleged diminution. A certiorari was issued, to which the clerk made a return, which has evidently been used as a precedent for the return in this case. The district attorney joined in error, and the plaintiff demurred to the joinder. The district attorney joined in demurrer, and the case was argued upon the issue thus made. There was no bill of exceptions in the case, nor is there in the report of the case any allusion to the change made by the Revised Statutes in the mode of reviewing judgment in criminal cases. The case was conducted throughout according to the common law practice, and that, too, without objection. In this respect, it stands alone. No other case will be found in which “ the out branches of the record ” [292] have been brought up by certiorari for the inspection of an appellate court, since the Eevised Statutes took effect.
By the fifty-second section of the article relating to “ indictments and proceedings thereon” (2 R. S., 728), it is declared that no indictment shall be deemed invalid, nor shall the trial, judgment or other proceedings thereon be affected, by reason of any defect or imperfection in matters of form, which shall not tend to the prejudice of the defendant. Now, if it be assumed that by some inadvertence or oversight the provision of the statute (2 R. S., 206, §§ 37, 38) requiring the district attorney to issue a precept at the time and in the manner specified, commanding the sheriff to summon the several persons who shall have been drawn in his county pursuant to law to serve as grand and petit jurors at any Court of Oyer and Terminer and jail delivery in his county, is still unrepealed, can any one conceive of a proceeding more completely a matter of form than the issuing of such a precept ? Is it possible for the defendant to be prejudiced by the omission of the district attorney to issue such a precept ? Provision is made by law for drawing both the grand and petit jurors. A certified list of the names is to be delivered to the sheriff, who is required to summon the persons named in such list, and to make his return thereon to the court. (2 R. S., 414, §§ 29, 30; id., 808, §§ 11, 12.) No venire need be issued. (2 R. S., 410, § 9.) The jurors returned for the Circuit Court are jurors for the Oyer and Terminer. (2 R. S., 733, § 2.) Whether, therefore, a precept is issued or not, the duties of the sheriff in respect to the summoning of the grand and petit jurors are the same. The only return he is required to make, or upon which the court is authorized to act, is upon the certified list delivered to him by the clerk. The issuing of the precept is but an idle ceremony. It in no way affects the duties of the sheriff or the rights of the defendant. There is no law recognizing that it should be returned; and the fact that the clerk certifies that, upon search, he finds no [293] such precept on file in his office, furnishes no legal evidence that none was issued.
Before the adoption of the Revised Statutes, a venire was necessary in all cases, civil and criminal. The want of it was deemed sufficient ground for reversing the judgment in The People v. McKay (18 John., 212). The learned judge who pronounced the opinion of the court in McGuire v. The People, overlooking the distinction between a precept and a venire, as well as the fact that the mode of proceeding in such cases has been entirely changed by the Revised Statutes, seems to have regarded the case of The People v. McKay as controlling authority upon the question whether the omis- ° sion to issue a precept was ground for the reversal of a judgment.
I am inclined to regard the language of the section requiring the district attorney to issue a precept to the sheriff at least twenty days before the holding of a court of Oyer and Terminer as sufficiently broad to make it applicable to all such courts; but as it is a matter which can in no possible manner concern the parties to be tried at such court, or indeed, anybody else, and as the duties of the sheriff are in all respects the same, whether the precept is issued or not, I regard the provision, like that which requires the sheriff to make proclamation before the sitting of the court, and other hundred provisions, as merely directory, and that, therefore, an omission to obey such directions does not invalidate the judgments rendered at such courts. But even if this were not so, the only way in which advantage could be taken of the want of such a precept would be by a motion in the same court to quash the indictment, or for a new trial, or in arrest of judgment, according to the circumstances. Upon certiorari or error, this court could only reverse for such errors as appear upon the face of the indictment or in the bill of exceptions. The motion to strike out the certiorari and the clerk’s return thereto should, therefore, be granted.
[294] It only remains to consider the grounds of error alleged in the bill of exceptions. The defendant was tried for the murder of his wife. The homicide took place on the 8th of July, 1856. It was proved that, until the last week in Hay, the defendant and the deceased had lived in John-street, in the city of Albany. The district attorney then. offered to prove, by a witness who resided next door to the defendant, that when he lived in John-street he had difficulty with his wife. The evidence was objected to by the counsel for the defendant as immaterial. The court overruled the objection, and the counsel for the prisoner excepted. The witness then testified that the deceased, in the fall of 1855, came to her house; that it was on a very cold Saturday night; that the defendant came in after her at twelve o’clock at night, and began to jaw and scold and abuse her; called her a whore; threatened the witness for keeping her; that the deceased went after a policeman to have him taken; that she came back and stayed all night; that the next Monday she made complaint against him; that the witness heard jawing all next day between them, in their room; that she heard them jawing and quarreling every week after; that the defendant talked the most.
The evidence was clearly admissible. It tended to show an alienation of affection. (The People v. Hendrickson, 8 How., 412.) Nor was the time mentioned by the witness so remote from the homicide as to render the testimony irrelevant. If the parties were “jawing and quarreling” from November until April or May, it would not be very unreasonable for the jury to infer that the same state of feeling continued until July.
The district attorney offered to prove, by one of the police jústices of the city, that in November, 1855, the deceased had made a complaint against the defendant for an assault and battery. This evidence was objected to by the counsel for the defendant as being too remote and otherwise improper and irrelevant. The objection was overruled and the [295] counsel for the defendant excepted. The witness testified that the deceased made a complaint against the defendant for assault and batteiy on the 26th of November, 1865, upon which he was arrested and an examination had; that the defendant was held to bail. The last answer was objected to by the counsel for the defendant, as being irrelevant, but the objection was overruled and an exception was taken. The testimony was properly received. It tended to show the extent of the difficulty between the parties. The evidence might properly be considered by the juiy on the question of motive. (People v. Hendrickson, 9 How., 165.) “Considerable latitude,” says Parker J., in delivering the prevailing opinion in the Court of Appeals, “ is allowed on the question of motive. Just in proportion to the depravity of the mind, would a motive be trifling and insignificant which might prompt to the commission of a great crime.”
The district attorney proved that the deceased had deposited at one time, in the fall of 1855, $100 to her own credit in a savings bank in Newburgh, and in June, 1856, $150 more; that a bank-book was issued in her own name and left with her sister in Newburgh; that the defendant complained that he had no money; that what money there was his wife had taken to Newburgh and put in the bank, and she had the bank-book. This evidence was objected to as improper and irrelevant, but the objection was overruled and an exception was taken. The objection was not well taken. The evidence showed not only the existence, but one of the sources of the ill feeling of the defendant towards his wife.
A physician was called by the defendant, who testified that he saw the defendant on the evening of the ninth of July; that he went into his cell and conversed with him; that he thought he was then deranged ; he thought it was delirium tremens, produced by previous drinking; that he knew defendant’s habits of drinking, and supposed drinking was the cause of his insanity; that he was not certain as to the cause; that he had been present and heard all the [296] evidence given upon the trial. He was then asked by the counsel for the defendant what, in his opinion, was the state of the defendant’s mind on the night of the 7th of July, 1856. The question was objected to by the district attorney, and the objection was sustained. The counsel for the defendant excepted to the decision. The witness was then asked what, in his opinion, founded on his personal examination of the defendant on the night of the ninth of July, was the state of his mind on the night of the seventh of July preceding. The question was objected to by the district attorney. The court sustained the objection, on the ground that it called but for conjecture, but allowed the witness to state how long he thought the defendant, when he-'saw him, had been in a state of delirium tremens. The defendant’s counsel excepted to the. decision.
(I think it was competent for the defendant’s counsel to have the opinion of the witness as to the state of-the defendant’s mind at a time anterior to the- time of the examination upon which-the opinion is founded.- The-witness had examined the defendant two days after the homicide. He had testified that; in his opinion, he was then deranged, and that he' thought delirium tremens was the - cause of such insanity. The defendant had a right to pursue-this inquiry, and to havethe opinion of the witness whether the state of mind in which he found the'defendant on the evening of the ninth of " July had existed:on the evening- of the-seventh of July. • Had -the court excluded this evidence altogether, I should have deemed the decision erroneous; But. the court merely excluded the question" in the form, in which it was. put to the witness, at the same timé allowing him to state how long,- in" Ms opinion,- the defendant had béen in a state of delirium tremens', when he:saw him::. The: difference between ‘the question as it was put to the1 witness by the defendant’s counsel, and the form' in-which it was allowed to be put by the court, is very slight indeed. It was quite immaterial, as it seems to me, in which form the- inquiry [297] was presented. So long as the defendant’s counsel was permitted to inquire of his witness how long, in his opinion, the state of mind in which he found him on the evening of the ninth of July had continued, I cannot see that he had any reason to complain of the decision. (The People v. Freeman, 4 Denio, 40.)
The counsel for the defendant asked the same witness what, in his opinion, the facts stated by the witnesses on the trial, supposing them to be true, showed as to the state of the defendant’s mind on the night of the seventh of July, the time his wife was killed. The question was objected to by the district attorney and excluded by the court. But at the same time the court decided that the witness might be asked his opinion upon a hypothetical case corresponding to the testimony, or by reading him the testimony and asking for his opinion, on the supposition that those facts were true. The defendant’s counsel excepted to the decision. I am utterly unable to distinguish between the question excluded by the court and those which were allowed. The witness was asked' his opinion upon the facts stated by the witnesses, supposing them to be true. This he was not allowed to state, but at the same time the court allowed the defendant’s counsel to suppose a case corresponding with the testimony and ask the witness his opinion opon such supposed case, or to read to the witness the testimony, and ask him, upon the supposition that those facts were true, what would be his opinion. I cannot see that by this decision the court excluded any evidence to which the defendant was entitled.
The examination of a medical witness, for the purpose of obtaining his opinion upon the facts developed upon the trial, is attended with some difficulty. If, as was proposed in this case, the witness is asked his opinion as to the state of mind of the defendant, upon the supposition that everything stated by the witnesses is true, it may happen that the jury will believe only a part of the testimony. In such a case it is obvious that the opinion of the witness [298] would be inapplicable to the facts found by the jury. The question that was put to the physician in this case, and upon which he gave his opinion, embraced more than twenty distinct facts which had been mentioned by the witnesses in the progress of the trial. Assuming all these to be true, the witness said he should think the defendant insane. But suppose the jury believe some of them to be trac and others not, it follows that they have no opinion upon the actual state of facts found by them. The proper mode of examining such a witness is, in my judgment, first to inquire of him as to the particular symptoms of insanity, asking whether all or any, and which, of the circumstances spoken of by the witnesses upon the trial are to be regarded as such symptoms, and then to inquire of him whether any and what combination of these circumstances would, in his opinion, amount to proof of insanity. (Wharton’s Am. Cr. L., 94.)
The presiding judge charged the jury that if they were satisfied from the evidence that, at the time the alleged offence was committed, the prisoner, in consequence of partial insanity, was laboring under such a defect of reason as not to be conscious of the nature, character and consequences of the act, or not to know that the act was wrong, he should-be acquitted ; that the fact of the killing was admitted, and that the act was done by the defendant was not disputed, and thus the issue was really reversed from the usual one.
The judge further charged that insanity is a defence to be affirmatively proved; that a failure to prove it, like a failure to prove any other fact, is the misfortune of the party making the attempt to prove it; that as sanity is the natural state, there is no presumption of insanity, and the defence must be proved beyond a reasonable doubt; that if the defendant had satisfied them beyond a reasonable doubt, so that they should find that at the time of killing he was so far really insane as not to be responsible for the act, they should aquit Mm, but otherwise they must convict him.
[299] No exception was taken to the charge; but the counsel for the defendant insists that to instruct the jury that the defence of insanity must be established beyond a reasonable doubt, before the jury would be authorized to aquit the defendant, was erroneous, and, though no exception was taken, the judgment should be reversed and a new trial awarded. The third section of the act of 1855, entitled “ An act to enlarge the jurisdiction of the Courts of General and Special Sessions of the Peace in and for the city and county of New-York” (Laws of 1855, 613) declares that every conviction for a capital offence, &e., shall be brought before the Supreme Court and Court of Appeals, from the Courts of Oyer and Terminer in this state, by a writ of error, with a stay of proceedings as a matter of right; and that the appellate court may order a new trial, if it shall be satisfied that the verdict against the prisoner was against the weight of evidence or against law, or that justice requires a new trial, whether any exception shall have been taken or not in the court below.
I am inclined to think this provision inoperative and void, so far as it relates to “ the Courts of Oyer and Terminer of this state.” The object of the act in which it is found is entirely local. It is to enlarge the jurisdiction of certain local courts in the city of New-York. The sixteenth section of the third article of the constitution declares that no local bill shall embrace more than one subject, and that shall be expressed in the title. I regard the-provision in question as a palpable violation of this salutary restriction upon legislation. Who would have expected to find, in a bill to enlarge the powers of local courts in the city of New-York, a section making a radical and most important change in the powers of the Supreme Court and Court of Appeals ? Instances had occurred in which important enactments had been smuggled through the legislature under cover of some bill with a modest and unpretending title ; ■ and to guard the legislature, as well as the public, against this kind of imposi[300] tian, the framers of the constitution adopted the section to which I have referred. I cannot suppose that any legislature would have been willing to adopt the third section of the act in question, without'quali'ficationor restriction, if brought to its attention by a direct proposition to amend the law relating to writs of error and appeals in criminal cases. Such a provision, I am persuaded, could only have made its way through the various forms of legislation by clothing itself with the guise of a local measure, and thus eluding the scrutiny which its own importance would have attracted.
But I propose,- now, to consider the grounds of objection to the charge, as though an exception had been taken in due form, that- we may see whether justice, in fact, requires that a new trial should be granted; for I admit that, if it can be seen that the verdict is either contrary to law or against the weight of evidence, some remedy should be provided to save the defendant from the fatal consequences of the error.
The only complaint made by the defendant’s counsel in respect to the charge is, that the judge instructed the jury that the defence of insanity must be proved beyond a reasonable doubt. In this I think there was no error. If it had been doubtful whether the defendant had committed the act with which he was charged, he would have been entitled to an acquittal upon the legal presumption of innocence which the law raises in his favor. By- that presumption every man is held innocent until his guilt is established. But'there is another legal presumption, equally operative as a rule of evidence, which is, that every man is presumed to be sane until his insanity is proved. So strong is the presumption of innocence that it can only be overcome by proof which establishes' guilt “ with a certainty that convinces and directs the understanding and satisfies the reason and judgment of those who are bound to act conscientiously upon it.” This is what is called proof beyond a reasonable doubt. In like manner, the presumption of sanity' must be overcome by proof of the same description.' “ What I mean [301] is,” says Chief Justice Hornblower, in The State v. Spencer (1 Zabriskie, 186), “ that when the evidence of sanity on the one side, and of insanity on the other, leaves the scale in equal balance, or so nearly balanced that the jury have a reasonable doubt of his insanity, then a man is to be considered sane and responsible for what he does. But if the probability of his being insane at the time is, from the evidence in the case, very strong, and there is but a slight doubt of it, then the jury would have the right, and ought to say, that the evidence of insanity is clear. The proof of insanity at the time of committing the act ought to be as clear and satisfactory, in order to acquit him on the ground of insanity, as the proof of committing the act ought to be, in order to find the sane man guilty.” (3 Greenl. Ev., §§ 5, 29.)
The great object of punishment is the protection of society. The guilty are punished that the innocent may be secure. Such punishment is only due to those who are conscious of crime. Humanity revolts at the very thought of making a man who is unconscious of wrong the subject of criminal punishment. While, therefore, the defence of insanity should not be regarded with disfavor, yet, as it asks that the offender, though guilty of the act charged against him, may be excused from punishment, it is the duty of those who administer the law to see that such a defence is fully sustained by satisfactory proof before it is allowed to prevail. I cannot see that anything more was done in this case. The charge of the learned judge who presided at the trial was, in my judgment, unobjectionable. I think the judgment of the Oyer and Terminer should be affirmed.
Gould, J.
Having, in the case of The People v. John Cummings, considered the preliminary questions (as to the irregularity in organizing the jury, first, on account of the district attorney’s not issuing a precept, &c.; secondly, by reason of the form and substance of the order of the Oyer and Terminer for summoning sixty additional jurors), it is unneces[302] sary to repeat my views on those points; I therefore proceed to the points, as to rulings and charging, that are in this case only.
The prisoner’s fourth point or exception is, like his fifth, upon a matter of evidence, referring chiefly, if not solely, to the motive the prisoner might have had for committing the homicide, for the purpose of showing that he did the act. This was actually the only ground on which it was offered, or objected to, or received, at the trial; and, in this point of view, the rulings, even if they were erroneous, would neither of them furnish any ground for ordering a new trial; since it appears in the bill of exceptions, and such was notoriously the fact, that before the defence commenced it was admitted, and it was so expressed by his counsel in opening his case, that the prisoner did the act. It is true that, on the argument here, such counsel claim that this testimony had a bearing on the question of insanity; but if it had, there are three sufficient answers to the exception: First. There was no such ground, for its exclusion, taken at the trial; Second. Had such ground been taken, or letting it be taken here, though not taken there, so far as the question of insanity is concerned, the proof is not as remote, in time, as the testimony the prisoner was allowed to give; Third. If it could have any bearing on that question (insanity), it could be only by furnishing a motive for a sane man to do the act; and that, whether he wished her to give him the money, and was angry that she did not, or thought that by killing her he would, as her administrator, get the money ; and in that light it was eminently proper on that issue.
The first division of the sixth exception refers to a question put to Dr. Staats and excluded by the court. The mere reading of the question shows it entirely too vague to be allowed, having neither a necessary basis in the testimony, nor any basis given it in the question itself; a mere loose opinion, entirely inadmissible. The other division of that exception is, of necessity, to be read in connection with the [303] permission to ask a question varying somewhat from the one excluded. That permission shows, necessarily, what was the exact fact, that at the time of putting this question there had not been the remotest intimation to court or jury, or the faintest idea, even in the minds of the prisoner’s counsel, of an attempt to show any other kind of insanity than delirium tremens. This being so, the form of question suggested by the court was the only proper form, inasmuch as it required, not a general, vague, undefined opinion of some lack of reason, but a definite, professional opinion as to the prior continuance of the particular disease inquired for; and it put that opinion in a shape to be tried as a matter of professional 'skill and judgment. And, since we are to hear opinions, it should be borne in mind that they are to be only those of competent, skillful men; and then, so limited and precise, that other competent and skillful men can judge of, and testify as to, their accuracy. Any other rule is little short of making an opinion a verdict; since, if an opinion (such as was asked for) can be given, I see no qualification or test of its accuracy that can be applied by another witness or by the jury.
In regard to this point, and indeed to the whole case, it ought to be remarked that no bill of exceptions, in such a case, should ever be allowed, unless it contain the whole case with all the testimony. In the present case, points like the one j ust spoken of (and there are others in it in the same position) come before a court that has no means of knowing what the true case was, and who, therefore, must to some extent decide in the dark. Were this case before us as it was tried, it would present a very different aspect.
As to the form of the question to be put to medical witnesses, covered by the seventh exception, it involves this consideration: whether it is ever proper to allow testimony, which is at best a mere opinion, to be sought by an interrogatory so shaped as to leave the reply open in any degree to the construction, in the minds of the jury, that themedi[304] cal witness.believes, or gives weight to, or in any manner sanctions as worthy of belief, the testimony which others have given as to facts. The form used, objected to and excluded, was, to a witness who had heard all the testimony: “ What, in your opinion, do the facts stated by the witnesses on the trial, supposing them to be true, show as to the state of the prisoner’s mind on the night of July 7th, 1856, the time his wife was killed ?” In excluding it, it was stated that “ it seemed impossible to ask this question without allowing the witness to answer, in fact, on his own impression of the truth of the evidence.” And the prisoner was allowed to ask the witness’ opinion on a hypothetical case, corresponding to the testimony, or by reading to him the testimony and asking him on the supposition that those facts were true; an allowance of which he very fully availed himself.
To show that this ruling was erroneous, we are cited to The People v. Thurston, tried in 1852 (2 Park. Cr. R., 49, and cases, there-cited). In that case a new trial was granted by three of the. four justices holding the general term ; two founding their decision on the admission of improper evidence not touching the point here, taken; and thé third, Mr. Justice Shankland, taking the ground that a. witness who had not heard all the evidence could not give his.opinion of the state of the prisoner’s mind; and therefore, such testimony having been received in- that, case, he - allowed a new trial, a position of which I certainly shall not dispute the soundness, especially when I find that the question, which he decided to have been improperly admitted, was in this form: “ From what you have heard of the case, ■ and" what you; have read of it, and what you know of it, what are your views of it?”
In the reasoning, with which he accompanies his .position he certainly states what would substantially sustain the position here taken by the prisoner’s counsel. But' any one who will read that case, and see how strangely the questions [305] were put, unobjected to, on all sides, will see that a very-great temptation was laid in the way of any judge to go beyond the case in his comments. The questions put on the part of the prisoner had brought out this testimony: “the evidence presents to my mind a very extraordinary case; I have never seen one exactly like it. This case, I am constrained to think, taking all the various symptoms as stated by the witnesses to be true, and taking all the circumstances together, is one resembling, if it be not decidedly, such as is described in the books as instinctive or impulsive mania,” &c., &c. And again: “Taking the evidence I have heard to be true, it appears to me that it shows the results of habits, &c., acting on a predisposition to insanity, and is, with the symptoms of general ill health, as detailed by the witnesses, veiy indicative, previous to the act, of the formative state of insanity.” And again: “ From what I saw of him in the jail, and from all the evidence given in the case bearing on the state of his mind at the time of the act, I think he was then insane.” Observe, this witness does not qualify his opinion of the evidence by taking it to be true, and none of them treat it as questionable, by saying, “ supposing it true.” I must profess myself unable to see anything, worth naming, to be left to the jury, if this be legal evidence, especially when ! find in the same case (p.138) the opinion of the court, saying, “that where the medical witnesses are men of integrity and skill, and all agree that a given state of facts proves insanity, it is the solemn duty of the jury so to pronounce by their verdict.” Thus taking it for granted that, though the “ state of facts ” is matter of proof, and the medical witnesses speak from the evidence,' and by law the jury are to pass on all the evidence, there can be a “ given state of facts ” on that evidence, and saying that on that the medical witnesses give the verdict. I certainly am not prepared to go any such length, and it seems to me that nothing resembling public justice could long survive such doctrines.
[306] In the McNaughton case, on the trial at Nisi Prius, the question was asked of a medical man who had been present in court and heard the evidence, whether, as matter of science, the facts stated by the witnesses, supposing them to be true, show a state of mind incapable of distinguishing between right and wrong. And it was allowed (10 Clark & Fin., 200), and the prisoner was acquitted. So that the point under discussion was not decided in that case, except on the trial.
We'will now see what was the opinion of the judges, as given to the House of Lords, oil this, as one of the questions which that acquittal caused to be asked. (47 Eng. Com. L R., 129, note.) The precise question put to the judges was “ Can a medical man, conversant with the disease of insanity, who never saw the prisoner previously to the trial, but who was present during the whole trial and the examination of all the witnesses, be asked his opinion as to the state of the prisoner’s mind at the time of the commission of the alleged crime; or, Ms opmion whether the prisoner was conscious, at the time of doing the act, that he was acting contrary to law; or, whether he was laboring under any, and what, delusion at the time ?” In reply, Mr. Justice Maulé says “In principle, it is open to this objection, that as the opinion of the witness is founded on those conclusions of fact which he forms from the evidence, and as it does not appear what those conclusions are, it may be that the evidence he gives is on such an assumption of facts as makes it irrelevant to the inquiry.” But as it was allowed in the McNaughton case, on the trial, he considers that to be, for England, a precedent, but against principle.
The other judges joined in an opinion delivered by the Chief Justice, Tindal; and to this same question, treating its branches as distinct questions, they say: “ We state that we think the medical man, under the circumstances supposed, cannot, in strictness, be asked his opinion in the terms above stated, because each of those questions involves [307] the determination of the truth of the facts deposed to, which it is for the jury to decide; and the questions are not mere questions on a matter of science, in which case such evidence is admissible. But where the facts are admitted, or not disputed, and the question becomes substantially one of science only, it may be conveinent to allow the question to be put in that general form, though the same cannot be insisted on as a matter of right.” I can only say that, to me, this seems not precisely an affirmative answer to the question And it should be specially noted, that the words used, “facts admitted, or not disputed,” are decidedly stronger than any supposed form of question (“ supposing them to be true"). And yet, even with those strong words, “the question cannot be insisted on."