REAVLEY, Circuit Judge:
Appellant, Fred Hill, was convicted of conspiring to possess heroin and cocaine with intent to distribute these controlled substances. Four issues are raised on this appeal. First, whether the trial court erred in denying Hill’s motion to dismiss the indictment on the grounds that the government trespassed Article IV(c) of the Interstate Agreement on Detainers Act (“IADA”), 18 U.S.C.App. pp. 1395-98 (1976), by failing to bring him to trial within 120 days of his arrival in the Northern District of Georgia. Second, whether the indictment should have been dismissed because the government infringed Article IV(e) of the IADA by returning Hill to the jurisdiction wherein he had been originally incarcerated before bringing him to “trial” in the Northern District of Georgia. Third, whether the lower court misjudged by failing to grant Hill’s motion to dismiss on speedy trial grounds. Finally, error is assigned to the trial judge’s refusal to instruct the jury that statements of certain absent coconspirators were admissible because he had made a threshold, independent determination of Hill’s participation in a conspiracy and that the remarks were in furtherance of the conspiracy. We hold that no reversible error was committed below and affirm.
I.
On May 18, 1976, Hill was indicted by a federal grand jury in the Northern District of Georgia for the aforementioned conspiracy. By letter dated May 28, 1976, the United States Attorney for the Northern District of Georgia requested that the United States Marshal in Atlanta have a detain-er lodged against Hill, who was then imprisoned in a California state penal institution. The request was eventually forwarded to the United States Marshal in San Francisco who, in turn, sent the detainer to the California penal facility at Soledad, California, where Hill was confined. The detainer bears a mark of June 21, 1976 as the date it was received.
Meanwhile, a writ of habeas corpus
ad prosequendum
(“writ”) was sent from the Northern District of Georgia commanding California prison authorities to relinquish possession of Hill for federal criminal proceedings in Georgia. The writ was sent to the Soledad complex with a cover letter that bore the date of June 15, 1976. For reasons that do not appear in the record, however, the date that the writ was received by the California institution was not recorded. It is known that Hill was surrendered into the custody of federal officers to be transported, pursuant to the writ,
on June 23, 1976, and he arrived in the Northern District of Georgia three days later.
On November 23,1976, Hill filed a motion to dismiss the indictment in accordance with Article V(c) of the IADA, alleging that he had not been brought to trial within 120 days of his arrival in the jurisdiction as required by Article IV(c) of the IADA. The magistrate to whom the motion was referred recommended that it be denied, and on January 10, 1977, the district court approved the recommendation. That same day Hill changed his plea to guilty while reserving the right to challenge the refusal to dismiss the indictment on appeal. In an opinion dated December 21, 1977, this court vacated the conviction and ruled that the district court could not accept a conditional guilty plea reserving the prerogative to raise non-jurisdictional issues on appeal.
United States
v.
Hill,
564 F.2d 1179 (5th Cir. 1977). Our mandate was made the judgment of the lower court on January 16, 1978.
During these developments Hill had been held in federal custody. On August 24,
1978, however, he was returned to the California facility at Soledad.
After remand, on October 27, 1978, Hill again moved to dismiss the indictment on Article IV(c) grounds. Subsequently, on January 17, 1979, a pending joint request of counsel for the government and counsel for Hill resulted in the trial court’s granting a continuance of the trial until March 12, 1979. But on March 7, 1979, both counsel again joined in a motion to remove the case from the trial calendar until at least two weeks after the district court ruled on the motion to dismiss. One week later the lower court denied the motion to dismiss, reasoning that the IADA would have been activated only if the detainer arrived antecedent to the writ and that Hill had failed to carry his burden of establishing the sequence of arrivals. On March 26,1979, Hill filed a
pro se
motion to reconsider in the district court, wherein he asserted breach of his speedy trial right for the first time,
and a petition for a writ of mandamus in this court to compel the district court to dismiss the indictment. We denied the petition on May 10, 1979 and a subsequent motion to reconsider that denial on May 24, 1979. Trial commenced July 23, 1979, and this appeal followed conviction.
II.
Congress enacted the IADA in 1970 to combat abuses of the use of detainers. The provisions were operative during all pertinent times for purposes of this appeal. Article IV(c)
of the IADA generally requires that a prisoner must be brought to trial within 120 days of his arrival in the “receiving State” in respect to any proceeding made possible by Article IV of the IADA.
The term “State” is defined to include the United States by Article 11(a). Failure to adhere to the applicable time limitation requires dismissal of the indictment with prejudice under Article V(c).
In
United States v. Mauro,
436 U.S. 340, 98 S.Ct. 1834, 56 L.Ed.2d 329 (1978), the Court decided two appeals, the
Mauro
and
Ford
cases, from the Second Circuit. In the
Mauro
case, a unanimous Court held that the provisions of the IADA are not implicated when the presence of a prisoner, held by a jurisdiction which is also a party to the Interstate Agreement on Detainers, is obtained solely by multiple use of the writ. The writ is simply not a detainer within the meaning of the IADA.
In the
Ford
case, a majority of the Court concluded that when a detainer is lodged with prison authorities in the sending state before the writ is re-
ceived, the IADA is activated. In such circumstances, the writ operates as a “written request for temporary custody” within the meaning of Article IV, necessitating the commencement of trial within the 120-day constraint.
However, neither the Court’s opinion in
Mauro,
nor any other decision of which we are aware, squarely addresses the question of whether the provisions of the IADA apply when it cannot be determined whether the detainer’s arrival antedated the writ’s arrival due to the absence of a record of a date when the writ was received. We are reticent to place the onus of proving the arrival of the detainer antecedent to the arrival of the writ on the prisoner on these facts. We should guard against erecting a precedent that would invite the filching of the benefits of the IADA by prison officials who intentionally or negligently fail to record the arrival of each document. Motions to dismiss may not surface until long after the omission when no one can realistically expect that the respective dates can be shown.
For present purposes, we will assume that the detainer arrived at the Sole-dad correctional complex before the writ arrived.
Our assumption, coupled with the
Mauro
holding in the
Ford
case, would dictate reversal if this episode had not predated that decision. However, we had already vacated Hill’s original conviction and remanded for a new arraignment and trial by the time
Mauro
was decided. A preliminary inquiry, then, is whether
Mauro
should be accorded retroactive application.
In
Brown
v.
Mitchell,
598 F.2d 835, 837-39 (4th Cir. 1979), a case involving Article IV(e) of Virginia’s enactment of the Interstate Agreement, the Fourth Circuit held that
Mauro
announced a new rule of law that was not clearly foreshadowed as required to satisfy the threshold test for potential denial of retroactive application set forth in
Chevron Oil Co. v. Huson,
404 U.S. 97, 106, 92 S.Ct. 349, 355, 30 L.Ed.2d 296 (1971).
Consequently, the decision was not to be afforded automatic retroactivity; rather, the court turned to and examined four factors governing retroactive application of new principles announced in
Stovall
v.
Denno,
388 U.S. 293, 296-300, 87 S.Ct. 1967, 1969-71, 18 L.Ed.2d 1199 (1967), and
Linkletter v. Walker,
381 U.S. 618, 636-38, 85 S.Ct. 1731, 1741 — 42, 14 L.Ed.2d 601 (1965). Those are:
(1) the extent of reasonable reliance upon the premise that the now-condemned conduct was legitimate;
(2) the purpose of the new rule and the extent to which that purpose will be aided by retroactivity;
(3) the effect on the administration of justice of applying the new rule retroactively; and
(4) the extent to which the new rule bears on the defendant’s guilt or innocence.
Brown,
598 F.2d at 838.
See generally, Brown
v. Louisiana,-U.S.-,-, 100 S.Ct. 2214,-, 64 L.Ed.2d-(1980). The panel concluded that none of these militated in favor of retroactive application of
Mauro
and that it should not be applied retroactively. The Third Circuit has recently followed suit in another case involving an Article IV(e) infraction.
United States
v.
Williams,
615 F.2d 585, 592-93 (3d Cir. 1980).
Accord, Hawkins-El
v.
Williams,
483 F.Supp. 415, 420-22 (D.Md.1979) (Articles
IV(c) and IV(e) under Maryland legislation);
Mars v. United States,
463 F.Supp. 87, 90-94 (E.D.Mich.1978).
With regard to the first, third, and fourth factors, the
Brown
court opined that the unsettled state of the law prior to
Mauro
led to reasonable reliance by prosecutors on the use of the writ; retroactive application would have a disruptive effect on the administration of justice; and the violation of the IADA did not impugn the integrity of the defendant’s conviction because there was no evidence of prejudice to the defense. 598 F.2d at 838-39. These observations apply with equal force to the facts of this case.
The second constituent presents only a slightly more imposing obstacle on our facts. We agree with the
Brown
court that the purpose of
Mauro
was “to encourage prompt disposition of charges against a prisoner who is subject to a detainer and thereby to prevent frustration of rehabilitation efforts.”
Id.
at 838. Two points deserve comment, however. First, a healthy percentage of the delay between Hill’s arrival in the Northern District of Georgia and his guilty plea
was attributable to pretrial motions by Hill and his codefendants.
Furthermore, any interference with Hill’s rights to an expeditious resolution of the pending charge and to access to any rehabilitation program at the Soledad facility that was affected by the presumed violation of Article IV(c) cannot be rectified by retroactive application of
Mauro. Williams,
615 F.2d at 593;
Mars,
463 F.Supp. at 92.
We arrive, therefore, at the same conclusion as every other decision expressly confronting the issue of which we are aware; the holding of
Mauro
is not to be given retroactive application.
Hence, we must peruse our jurisprudence prior to the Supreme Court’s decision in
Mauro
to determine whether we would have equated the writ with a “request for temporary custody” within the meaning of Article IV(c).
The paucity of decisional law in this circuit construing the IADA before the Court’s decision in
Mauro
enhances the speculative nature of our task.
United States v. Scallion,
548 F.2d 1168 (5th Cir. 1977),
cert. denied,
436 U.S. 943, 98 S.Ct. 2843, 56 L.Ed.2d 784 (1978), was our premiere effort on the applicability of the statute. We correctly presaged the
Mauro
Court’s ruling that exclusive, albeit repeated, use of the writ does not activate the provisions of the IADA. But neither that decision nor any of our cases since have decided whether a writ succeeding the lodging of a detainer activates the time constraints of the IADA.
The courts outside this circuit had not harmonized on this point prior to
Mauro.
A panel majority of the Second Circuit in
United States v. Ford,
550 F.2d 732, 742 (2d Cir. 1977), correctly forecast how the Supreme Court would decide that case on review in
Mauro;
it held that a writ that followed the lodging of a detainer did constitute a written request for temporary custody. A similar result was reached in
Gray v. Benson,
443 F.Supp. 1284, 1292-93 (D.Kan.1978). By contrast, both
Mars v. United States,
443 F.Supp. 774 (E.D.Mich. 1978)
and
Huff v. United States,
437 F.Supp. 564 (W.D.Mo.1977)
held that this factual sequence did not implicate the IADA.
We draw some guidance for our conjectural examination from dicta in
Scallion.
In the process of distinguishing detainers from the writ, the court repeatedly emphasized that Congress did not intend to construct the IADA machinery as the exclusive means of transferring prisoners for the purposes of prosecution. 548 F.2d at 1171,
1172. If the prior arrival of a detainer would have been held to transform the writ into a written request for temporary custody, the writ would not have been a distinguishable method of transfer because the IADA would have been triggered. It is also noteworthy that the
Scallion
panel chose not to distinguish
United States v.
Ricketson, 498 F.2d 367, 372-73 (7th Cir.),
cert. denied,
419 U.S. 965, 95 S.Ct. 227, 42 L.Ed.2d 180 (1974), on the grounds that a detainer had been lodged in that case. Rather, the
Scallion
court emphasized that the
Ricketson
panel had
assumed
that the writ operated as a written request for temporary custody and then determined that the 120-day limitation was not exceeded. 548 F.2d at 1173 n.8. One conclusion that might be drawn from the distinction chosen is that the
Scallion
court believed that the writ did not operate as a written request for temporary custody. Finally,
Scallion
recognized that the primary concern of Article IV is the elimination of abuses of detainers by states — not elimination of abuses of the writ by federal prosecutors.
Id.
at 1172 n.5. But a holding that the writ is equivalent to a written request for temporary custody once a detainer is lodged seems to mean that the effect of the writ is limited by the IADA. For instance, Article V(c) limits the “temporary custody” to prosecution of the charge or charges contained in the indictments, informations, or complaints which undergird the detainer or detainers, or to prosecution on any other charges arising out of the same transaction. Consequently, the government could not cause the writ to be issued and then hold the prisoner indefinitely while seeking to try the defendant on charges unrelated to those in the charging instruments supporting the detainer. This may be potent elixir for a perversion of the writ, but before
Mauro
we doubt if our language and reasoning in
Scallion
would have squared with this result.
Apart from the
Scallion
locution, we suspect that the second proviso in Article IV(a)
of the IADA would have served to deter us from equating a writ with a written request for temporary custody. The apposite proviso mandates a thirty-day waiting period after delivery of the written request for temporary custody during which the governor of the sending state is empowered to disapprove the request. We would have thought that, under the Supremacy Clause, a state was not free to delay or disapprove compliance with the writ executed under federal statutory authority in 28 U.S.C. § 2241 (1976).
Moreover, the
Ford
panel’s solution to the paradox is singularly unpersuasive. The fact that the governor in that case had never refused to honor the federal writ and the fact that the structure and purposes of the IADA made it clear that the speedy trial provisions contained in the statute were intended to apply to the federal government as a “receiving state,” 550 F.2d at 737, did not resolve an apparent conflict between a state’s
power
to refuse a written request for temporary custody and a state’s
power
to decline to honor a federal writ.
Mindful of the hypothetical character of our chore, we nonetheless conclude from these indicia that the rule in this circuit before the Supreme Court’s decision in
Mauro
was that a writ appearing in the hands of prison officials after a detainer had been lodged did not operate as a written request for temporary custody so as to actuate the IADA. Consequently, the criminal proceedings against Hill in the Northern District of Georgia were not “made possible by [Article IV]”; rather, they were made possible by the writ. Article IV(c) was not transgressed in this case.
III.
Hill suggests that the government also failed Article IV(e) of the IADA
by returning him to the Soledad facility before bringing him to trial in the Northern District of Georgia. The argument has been foreclosed below because Hill did not raise the contention in the district court.
United States v. Eaddy,
595 F.2d 341, 346 (6th Cir. 1979);
Scallion,
548 F.2d at 1174.
IV.
The speedy trial right is the focus of Hill’s third argument. He insists that the delay involved between his indictment and the conviction currently under review infringed the Sixth Amendment, Fed.R. Crim.P. 48(b), the Federal Speedy Trial Act (“FSTA”), 18 U.S.C.A. § 3161
et seq.
(West Supp.1980), and the local speedy trial plan for the Northern District of Georgia. The last two provisions warrant only passing attention.
The sanctions of the FSTA do not apply to indictments filed before July 1, 1980. 18 U.S.C.A. § 3163(c) (West Supp. 1980). Hence, dismissal was not required under this legislation.
E. g., United States v. Metz,
608 F.2d 147, 152 (5th Cir. 1979),
pet. for cert. filed,
48 U.S.L.W. 3772 (1980);
United States v. Noll,
600 F.2d 1123, 1127 (5th Cir. 1979). Until the FSTA sanctions do activate, we look to the interim plan of each district, adopted pursuant to 18 U.S. C.A. § 3165 (West Supp.1980) and Fed.R. Crim.P. 50(b), to determine whether the pretrial delay requires dismissal.
Id.; United States v. Walters,
591 F.2d 1195, 1201 (5th Cir.),
cert. denied,
442 U.S. 945, 99 S.Ct. 2892, 61 L.Ed.2d 317 (1979). The local plan is a binding rule of law,
United States v. Elorduy,
612 F.2d 986, 988 (5th Cir. 1980), but the dismissal sanctions for violating the speedy trial plan in the Northern District of Georgia were not obligatory at the time Hill moved to dismiss on speedy trial grounds.
Absent compulsory sanctions, dismissal is not mandated for failure to observe local time limits.
Id.; Metz,
608 F.2d at 152.
Fed.R.Crim.P. 48(b) permits a district court to dismiss an indictment if there is any “unnecessary delay in bringing a defendant to trial.” However, dismissal under Rule 48(b) is not required unless the constitutional speedy trial right has been flouted.
E. g., Noll,
600 F.2d at 1127;
United States v. Gorthy,
550 F.2d 1051, 1053 (5th Cir.),
cert. denied,
434 U.S. 834, 98 S.Ct. 121, 54 L.Ed.2d 95 (1977).
The four-prong test of
Barker v. Wingo,
407 U.S. 514, 530, 92 S.Ct. 2182 (1972), serves as the compass for determining whether the Sixth Amendment demands dismissal.
E. g., United States v. Vanella,
619 F.2d 384, 385-86 (5th Cir. 1980);
Elduroy,
612 F.2d at 988. The factors are: (1) the length of the delay; (2) the
reason for the delay; (3) the defendant’s assertion of the speedy trial right; and (4) prejudice to the defendant.
“The first prong of
Barker,
the length of the delay, is the threshold ‘triggering mechanism.’ No inquiry into the other factors is required unless there has been a delay of such length as to be presumptively prejudicial.”
United States v. Edwards,
577 F.2d 883, 888 (5th Cir.) (footnotes omitted),
cert. denied,
439 U.S. 968, 99 S.Ct. 458, 58 L.Ed.2d 427 (1978). The Sixth Amendment clock begins to tick upon indictment when no prior arrest on the alleged offense is involved.
Dillingham
v.
United States,
423 U.S. 64, 96 S.Ct. 303, 46 L.Ed.2d 205 (1975) (per curiam);
United States v. Marion,
404 U.S. 307, 320-21 (1971). In particular, the date of the indictment is the crucial date for a prisoner already incarcerated on a prior offense.
United States
v.
Manetta,
551 F.2d 1352, 1354 (5th Cir. 1977). In this case, the delay between the indictment (May 18, 1976) and the commencement of the trial resulting in this appeal (June 23, 1979) was 38 months. Such a delay is presumptively prejudicial.
See United States
v.
Herman,
576 F.2d 1139, 1145 (5th Cir. 1978) (22 month and 20 day delay);
United States v. Netterville,
553 F.2d 903, 914 (5th Cir. 1977),
cert. denied,
434 U.S. 1009, 98 S.Ct. 719, 54 L.Ed.2d 752 (1978) (19 month and two week delay).
The reasons offered by the government for the delay is the second consideration. Any prolongation attributable to conduct by the accused is excused.
Hill v. Wainwright,
617 F.2d 375, 378 (5th Cir. 1980);
Torres v. Florida,
477 F.2d 555 (5th Cir.) (per curiam),
cert. denied,
414 U.S. 852, 94 S.Ct. 148, 38 L.Ed.2d 102 (1973). Our protracted recitation of the facts demonstrates that no more than about 16 months of the aggregate 38-month interim between indictment and trial should be charged to the government.
Approximately five weeks lapsed between the return of the indictment and Hill’s arrival in the Northern District of Georgia. There is no contention that the government dallied in its efforts to secure Hill’s presence in that district as promptly as existing channels for transfer permit. The delay is ascribable to the fact that Hill’s prior activities resulted in confinement in California.
Another six weeks was consumed between November 23, 1976 and January 10, 1977 by Hill’s first motion to dismiss, hearings on the motion, and judicial deliberation. Similarly, nearly seven months of delay, between October 27, 1978 and May 24,1979, can be accredited to Hill’s second motion to dismiss on Article IV(c) grounds, his two motions for continuances, his motion to reconsider in the trial court, his petition for the writ of mandamus in this court, and his motion for reconsideration when we denied the petition. The government was entirely reasonable in choosing not to try Hill during the pendency of these motions.
Hill,
617 F.2d at 379;
see Torres,
477 F.2d at 556. Finally, slightly more than a year expired between Hill’s voluntary tender of a guilty plea and the date this court’s ruling became the judgment of the district court. The delay eventuated by Hill’s efforts to secure appellate relief from the conviction should not be attributed to the government.
Hill,
617 F.2d at 378 — 79;
cf. Herman,
576 F.2d at 1145 (delay occasioned by withdrawal of a guilty plea).
The third
Barker
factor is defendant’s assertion of the speedy trial right. It is noteworthy that Hill did not indicate any interest in invoking the speedy trial guaranty prior to his March 26, 1979 motion to reconsider the denial of his second motion to dismiss on Article IV(c) grounds. De
spite being represented by the same counsel throughout these proceedings, Hill failed to assert the speedy trial right until four months before trial. Nor was the assertion with vigor; the record does not contain a ruling by the trial court on Hill’s motion to reconsider, and he did not again press the right before trial. These facts militate against the claim that speedy trial was denied.
Edwards,
577 F.2d at 889;
Netter-ville,
553 F.2d at 914. Subsequent to the motion to reconsider in the district court, only two months of delay were not attributable to Hill’s legal stratagems.
The final ingredient
in the balance is prejudice to the defendant. The
Barker
Court identified three forms involved in pretrial delay: oppressive pretrial incarceration; anxiety engendered in the accused by the pending charges; and impairment of defenses. Justice Powell, writing for the majority, explained that the most serious prejudice was the final form. 407 U.S. at 532, 92 S.Ct. at 2193.
Hill does not complain that he suffered any pretrial incarceration as a result of the charge. Apparently, his sentence in California would have kept him confined throughout these proceedings. Nor does he profess a debilitation of possible defenses. Thus, in the absence of an affirmation of specific prejudice, we must presume that Hill relies on the anxiety inherent in any delay. Standing alone, however, this form of prejudice is insufficient to warrant reversal.
E. g., Vanella,
619 F.2d at 386;
Metz,
608 F.2d at 152.
This journey through
Barker’s
criteria and the progeny of that case convinces us that, on balance, we cannot say that Hill was denied his right to a speedy trial. The district court did not err by declining to dismiss the indictment either pursuant to the Sixth Amendment or pursuant to Rule 48(b).
V.
The final assault on the conviction involves an imaginative argument. Hill does not suggest that the trial court erred in its application of
United States v. James,
590 F.2d 575 (5th Cir.) (en banc),
cert. denied,
442 U.S. 917, 99 S.Ct. 2836, 61 L.Ed.2d 283 (1979). Rather, he argues that the district judge should have instructed the jury that the reason that hearsay statements of certain nonattendant coconspirators were admissible was that the judge had made a preliminary determination, out of the jury’s presence, that substantial evidence pointed towards the existence of a conspiracy between Hill and the declarants and that the statements were made in furtherance of the conspiracy. Further, by the close of all the evidence the judge was convinced that the evidence preponderated in this direction. Only by such an instruction, Hill argues, would the jury be properly admonished against affording the hearsay utterances undue moment.
No authority has been cited for this novel proposition and our own research has uncovered none. We agree with the government that such an instruction carries profuse potential for conveying to the jury an understanding that the trial court has been persuaded of the defendant’s guilt. Such a tacit transmission should be avoided.
See United States v. Musgrave,
444 F.2d 755, 763 (5th Cir. 1971),
cert. denied,
414 U.S. 1023, 94 S.Ct. 447, 38 L.Ed.2d 315 (1973);
cf. United States
v.
Welliver,
601 F.2d 203, 208-09 (5th Cir. 1979) (repeated usurpation of the questioning of witnesses transmits a notion that the trial judge believes the accused to be guilty). No error was committed by refusing to give the requested charge.
Having assured ourselves that no reversible miscarriage obtained below, the judgment, of the conviction is
AFFIRMED.