Cutter, J.
The first case is an action by Food Specialties, Inc. (Specialties), against an advertising agency, John C. Dowd, Inc. (Dowd), in three counts, alleging conversion of, and damage to, certain advertising material belonging to Specialties. The action by Dowd against Specialties seeks damages for breach of an advertising contract and also to recover a balance alleged to be due under the contract.
The cases were referred to an auditor, whose findings of fact were to be final, and were tried together. Certain modifications in the auditor’s report were directed by the trial judge, who ordered judgment for Specialties in the sum of $3,115 with interest, in the case brought by Specialties, and for Dowd in the sum of $12,916.59 with interest in Dowd’s action. Specialties and Dowd appealed in the action by Specialties. Specialties appealed in the action by Dowd. The facts are stated as found by the auditor.
On July 15, 1955, Specialties, a manufacturer of pizza pie mix, made with Dowd a contract, the relevant portions of which are: “Dowd ... is authorized to act for . . .
Specialties Inc. in the planning, preparation, purchasing and distribution of its advertising and to perform . . . related services .... It is part of the agency’s duty [a] to write
and design the advertising, purchase art work . . . etc. and assemble the advertising campaign for the approval of the client. . . [Vj to know the qualities of all media . . . and to buy space or time in such media . . . [andj H°] to contract for the services of media
when authorized
.... Contracts . . . authorized by the client and executed by the agency shall be regarded as direct obligations of the client. ...
All material property of the client furnished to the agency, or otherwise procured by, or prepared by the agency for the client, shall remain the client’s property, subject to his order and use,
or stored by the agency at the client’s risk. . . . This agreement shall continue for . . . one year from July 14, 1955, and thereafter
until terminated by at least 90 days written notice by either party”
(emphasis supplied). The agency was to be paid by a "commission of 15% or its equivalent.” In accordance with custom "in the advertising field when a concern changes from one agency to another,” all advertising material developed by Specialties’ two former agencies was forwarded to Dowd. This material was never used by Dowd.
Friction between Specialties and Dowd soon arose. One difficulty related to certain television commercial films. Dowd, in behalf of Specialties, had made a contract for a period ending May 1, 1956, for the indorsement by one Colona, an actor, of Specialties’ pizza pie mix, including the use of his picture and certain services in advertising. The contract was later renewed for a further period ending April 30, 1957. The earlier contract called for Colona’s presence in New York in August, 1955. Prior to this New York visit, one Gross, Dowd’s "account supervisor” then handling the Specialties account, suggested to Price, the chief executive officer of Specialties, whose duty it was “to supervise the advertising program,” that it "might be a good plan to have some TY commercial shots made by Colona.” Gross explained “that it could be done . . . cheaper when Colona was in New York,” but there “was no talk about the possible cost.” Specialties “had had a commercial made previously” at a "cost of . . . approximately
$1,500.” Although Specialties had no plans to “use . . . such a TV strip,” Price, “assuming that the cost of it would be comparatively little, . . . told Gross to go ahead and make plans for it.” Dowd’s representatives arranged with Sound Masters, Inc., to make the commercials at its studios. “This involved a change in the . . . plans which had called for . . . filming . . . the TV commercials at the same . . . place where . . . [certain] still pictures [of Colona] were to be taken.” On August 10, one Tully, Dowd’s television director, showed the “storyboard,” which set out “each action ... to take place in the commercial,” to Price and to two other officers of Specialties, including one Smith, who with Price was “in charge of advertising.” Smith and Price were “the ones with whom . . . Dowd . . . had previously dealt.” Saleson, the other officer, “had nothing to do with advertising.” After minor “changes were made [in the storyboard] Price said it looked all right to him and then he and Smith . . . moved to another part of the room.” Gross of the Dowd organization, who was also present, had been informed that the price estimated by Sound Masters, Inc., was $4,500, but “said nothing about this estimated price while Price and Smith were present.” The films were made the next day.
In November, 1955, Specialties received an invoice from Dowd for the Colona commercial in the sum of $4,321.80, “the first information Price and Smith received in regard to the cost.” Shortly thereafter, Price told Gross that the bill was “extremely large” and that Dowd “had no authority to go ahead with a commercial as expensive as this after informing them that it would be a small cost.” On November 18, 1955, at Gross’s suggestion, Price wrote to Dowd about his complaints. In his letter, he refused to pay more than $500 for the commercial and enclosed a check for that sum. No further bill was sent by Dowd to Specialties for this invoice until September 10, 1956, after Specialties’ termination (mentioned below) of the agency agreement. “[I]t was the custom in the trade for the customer to be informed” of the estimated cost “before a TV commercial
was made.” Gross, when he first talked to Price about the commercial, thought its price would be much less, and Price reasonably assumed “from his original conversation with Gross that the cost . . . would be comparatively inexpensive and . . . authorized it on this basis.” The auditor concluded on “these facts previously found . . . that the making of the TV commercial was not authorized by . . . Specialties . . . and that it was not hable for the bill,” and “that . . . $500 was a reasonable payment for the charge authorized.”
In a letter of August 13, 1956, to Dowd, Price referred to matters about which Specialties was dissatisfied (see footnote 2,
infra)
and terminated “our appointment of your agency as our advertising agency.” Although asserting that, because of Dowd’s alleged failure to perform its duties, “no notice of termination . . . [was] required,” Price there stated that Specialties would place its advertising through Dowd for a further thirty day period. The letter contained a demand that the material from Specialties’ former advertising agencies in Dowd’s possession and all material prepared by Dowd which Specialties had paid for be turned over to Specialties at the end of the thirty day period. On September 13, a further letter notified Dowd that Saleson would call on “September 18 ... to receive delivery of the . . . property. ... If you wish to withhold the material developed in your August and September invoices until payment of these invoices that will be satisfactory. At the time of the delivery of our material . . . Saleson will deliver to you our check in the amount of your July invoice.” To this the treasurer of Dowd, on September 14, replied, “We do not feel that this material should be released until there is a complete settlement of your obligations to us. At that time we shall deliver all your material which is currently being stored. In connection with the Colona TV spots . . . these items are still ... on your account . . . unpaid as they were properly authorized and a price quoted to Mr. Saleson by Mr. Gross in the presence of Mr. Tully.” On August 7, 1956, an invoice for July
($1,043.72) was sent by Dowd to Specialties and on September 10, 1956, invoices were sent for August ($1,636.43), September ($2,366.31), and the balance claimed on the Colona TV film ($3,821.80). These, in the aggregate, amounted to $8,868.26.
Saleson went to Boston on September 18 and offered Dowd’s treasurer a check for the amount of the July invoice. The treasurer said that "they felt they could not give back the materials until all the bills were paid for the whole account.” No further demand was made, and no further payment was offered, by Specialties. None of the material was ever delivered to Specialties by Dowd. In September, 1956, Specialties made a contract with Charles Hutchinson, Inc., another advertising agency.
The auditor found that on August 13, when Specialties gave notice of termination of the contract, "there was no existing breach of contract on the part of Dowd,” and that Specialties’ notice of August 13 followed by its later actions, including hiring the Hutchinson agency, "constituted a breach of contract” by Specialties. He found also that Dowd was entitled to recover for this breach the amount which Dowd would have received in net commissions over the stipulated ninety day period for notice of termination, a total of $3,971.86. This finding was based, in part at least, on evidence that in 1955 such an amount was earned from September 1 to November 13. In addition, the auditor found that Dowd was entitled to the amount of the July, August, and September invoices ($5,046.46) and a small additional item ($76.47). He found for Dowd in its action in the total sum of $9,094.79. He refused Dowd recovery for the balance claimed for the Colona TV film.
With respect to the action brought by Specialties, the auditor found that, although the contract between Specialties and Dowd contained no provision about the time of Specialties’ payments of Dowd’s invoices, the arrangement early made was that invoices were to be paid at the end of the following month, so that, on September 18 when Saleson called for the materials in Dowd’s possession, only the July
invoice was then due and payable. The auditor then considered the provision of the contract that “[a]ll material ... of the client furnished to the agency, or otherwise procured by, or prepared by, the agency for the client, shall remain the client’s property, subject to his order and use.” He found (a) that, “[u]nless a ruling of law requires otherwise . . . [Dowd’s] duty to perform this obligation . . . was not dependent upon there being no breach of contract” by Specialties when the request was made, and (b) that on September 18 Specialties was entitled to possession of the materials except the Colona TV spots and material covered by the August and September invoices (which in any event had been ehminated from Specialties’ demand by Price’s letter of September 13). He, accordingly, concluded that Dowd had converted the materials (with the exception just noted) and found Specialties entitled to recover the following items: (a) for material of former agencies, $3,115.15; (b) for Dowd material prepared prior to July 1, 1956, and paid for by Specialties, $6,704.55; (c) for damage through inability to use Colona material (other than the TV spots) between the termination of Specialties’ contract with Dowd (November 13) and the expiration of Specialties’ contract with Colona (April 30, 1957), $3,600. The auditor thus found for Specialties in the action brought by it in the total sum of $13,419.70.
Upon Specialties’ objections to the auditor’s report, the trial judge correctly struck out certain summaries of testimony, which were not appropriate parts of the report. See
Lombardi
v.
Bailey,
336 Mass. 587, 590-591;
Spirito
v.
Capar,
337 Mass. 431, 432. The judge ruled that the contract provision with respect to Specialties’ right to materials “prepared by the agency for the client” is “subject to the right of the agency to assert its statutory or common law liens for such work, labor and material as is furnished or prepared by . . . [the] agency; and that it was not a conversion for the agency to assert such liens by retaining such property until money owed ... at the time of demand was paid.” The recovery by Specialties in its action was ac
cordingly reduced to $3,113.15, the value of the material of Specialties’ old agencies. The judge also reversed the auditor’s conclusion that, on the relevant subsidiary facts, the Colona TV commercial was not authorized, and permitted Dowd to recover the balance due for this item, thereby increasing Dowd’s recovery in its action to $12,916.59.
1. On August 13, 1956, Specialties in effect repudiated the contract, the repudiation to be effective at the end of a thirty day period. See
Orebaugh
v.
Badger,
279 Mass. 54, 59-61. The auditor had found that, on August 13, there was no existing breach by Dowd, and this finding was consistent with relevant subsidiary findings.
Accordingly, he reasonably concluded that, since “the contract could only be terminated at that time by a ninety day notice,” the letter of August 13, when taken together with the later hiring in September of another agency (and consequent failure to place further business through Dowd), constituted a material breach of contract. The letter, as the auditor stated, did not “terminate the contract thirty days thereafter” even if, as the auditor assumed, the notice did operate to terminate the contract after ninety days, and even if it did discharge the duty of further tender or performance of advertising services by Dowd after the thirty day period.
Bucholz
v.
Green Bros. Co.
272 Mass. 49, 52-53. See
Schilling
v.
Levin,
328 Mass. 2, 5-6;
Vander Realty Co. Inc.
v.
Gabriel,
334 Mass. 267, 269; Restatement: Contracts, § 280.
2. Whether a conversion of any of Specialties’ property took place depends upon whether Dowd, when it refused to deliver that property to Specialties, had an enforceable hen. The auditor’s subsidiary findings show that there was action by Dowd amounting to an unequivocal refusal to surrender the demanded property, for Specialties had given
ample notice, both on August 13 and on September 13, of its demand, so that Dowd had been afforded reasonable opportunity to decide before September 18 whether it would comply with the demand. Requests in behalf of Dowd on September 18 for further discussion were unreasonable attempts at delay and did not constitute proper conditional refusal of Specialties’ demand. See Prosser, Torts (2d ed.) § 15, pp. 74-75.
If Dowd did have a lien, Specialties could not become entitled to the immediate possession of the property without tendering to Dowd the amount secured by the lien. See Restatement: Security, § 78; see also §§ 59-62, 66, 71. Unless Specialties had the right of immediate possession, Dowd’s refusal to deliver the property to Specialties was not a conversion.
Gilman
v.
Zirkin,
265 Mass. 372, 373. See
Massachusetts Lubricant Corp.
v.
Socony-Vacuum Oil Co. Inc.
305 Mass. 269, 271; Restatement: Torts, §§ 223 (g), 225, 237 (see also Tentative Draft, April 18, 1958, of Restatement 2d: Torts, §§ 222A, 225).
The trial judge obviously concluded that, as to the material prepared by Specialties’ earlier advertising agencies, Dowd had no lien either (a) as agent by way of a “particular lien upon property . . . in . . . [jits] possession, for charges . . . and expenses . . . connected with the particular property held,” see Lummus, Liens, § 116;
Stevens
v.
Robins,
12 Mass. 179, 181;
Vail
v.
Durant,
7 Allen, 408, 409;
Arwshan
v.
Meshaka,
288 Mass. 31, 35; Restatement 2d: Agency, § 464, or (b) by reason of services performed upon chattels to improve them. See
Flesher
v.
Handler,
303 Mass. 482, 483. See also
Townsend
v.
Newell,
14 Pick. 332, 335;
Henwood & Nowak, Inc.
v.
Dietz,
246 Mass. 9, 11;
Murphy
v.
Brilliant Co.
323 Mass. 526, 529n;
North End Auto Park, Inc.
v.
Petringa Trucking Co. Inc.
337 Mass. 618, 624. Cf.
De Vinne
v.
Rianhard,
9 Daly (N. Y.) 406, 410-411;
Jeanette Doll Co. Inc.
v.
Cusmano,
120 Misc. (N. Y.) 782, 783. Clearly Dowd did nothing, and incurred no expenses, with respect to these advertising materials prepared by others. The judge, however, but not the auditor, ruled that Dowd
could assert a lien on property prepared by Dowd for Specialties “by retaining such property until money owed . . . at the time of demand was paid,” perhaps concluding that, under the authorities just cited, Dowd had an agent’s lien (and possibly a common law lien for adding value to the materials) upon all property which the parties to the agency contract expected would arise from its performance. See
Morgan
v.
Congdon,
4 N. Y. 552, 553;
Conrow
v.
Little,
115 N. Y. 387, 392-393;
Braufman
v.
Hart Publication, Inc.
234 Minn. 343, 348-350;
Blake
v.
Nicholson,
3 Maule
&
Selw. 167, 169;
Chase
v.
Westmore, 5
Maule & Selw. 180, 183; Annotation, 25 A. L. R. 2d 1037-1040.
We need not decide whether an agent’s lien, or a hen for adding value to the materials, or even a vendor’s hen, existed apart from (a) the parties’ agreement that property “furnished to . . . or . . . procured ... or prepared by the agency . . . shall remain the client’s property, subject to his order and use,” taken together with (b) the parties’ arrangement that Dowd’s invoices were to be paid by Specialties at the end of the month following. The aggregate effect of the contract provision and the arrangement for credit prevented any hen upon the property (whether prepared by Dowd or by others) asserted by Dowd.
Any hen which Dowd might have at common law or by statute, of course, could be modified or waived by contract. Restatement: Security, § 65. Provisions for credit have been held to be inconsistent with a lien, as, for example, where repaired property is to be returned before payment is due.
Wiles Laundering Co.
v.
Hairdo,
105 N. Y. 234, 240-243.
Matter of Heinsheimer,
214 N. Y. 361, 366-368.
Stoddard Woolen Mfy.
v.
Huntley,
8 N. H. 441, 442.
Crawshay
v.
Homfray,
4 Barn. & Ald. 50, 51-53.
Bock
v.
Gorrissen,
2 DeG. F. & J. 434, 447-449. Lummus, Liens, §§ 27, 119. See
Chase
v.
Westmore,
5 Maule & Selw. 180, 186-187. In Restatement 2d: Agency, § 464, comment d, it is said that a “hen does not exist merely because the principal has committed a breach of the contract of employment,” a doctrine that is consistent with the cases just cited.
The contract provision by which Dowd was to hold property, subject to Specialties’ “order and use,” would have had little meaning if Dowd at any time could decline to deliver material and assert a lien for sums not yet due. It was obviously intended that Dowd should comply with Specialties’ orders with respect to the property and rely on Specialties’ credit, rather than on any lien. A lien upon items already paid for, to coerce payment for other items where Specialties’ liability was disputed in good faith, is inconsistent with the contract and credit terms. It may be that, -under the cases already cited, no agent’s lien, or lien for adding value to the items, could arise later in any event because of the provision for credit. See
Matter of Heinsheimer,
214 N. Y. 361, 368. This issue we need not decide. Our conclusion is reinforced by the fact that, if Dowd had intended to provide for hens, it could have made appropriate stipulation for them in the agreement. To the extent that Dowd may have been a vendor of chattels to Specialties, the contract provision and the arrangement for credit prevented any vendor’s lien during the credit period. In view of the arrangement for monthly invoices, the items improperly withheld we regard as separable from those for which payment was not due at the time of demand. As to the latter group of items, Specialties, by its letter of September 13, 1956, either withdrew or did not press its demand. As to the items covered by the July, 1956, and prior invoices (except the Colona TV invoice), Specialties had either made or offered full payment. Nothing in the record suggests that Specialties was insolvent on September 18, 1956, or at any other time. As to vendors’ liens, see Lummus, Liens, § 99; Williston, Sales (Rev. ed.) § 507a; uniform sales act, G. L. c. 106, § 43 (1) (c), prior to the enactment of the Uniform Commercial Code. See also
Arnold
v.
Delano,
4 Cush. 33,39;
Jones
v.
Le May-Lieb Corp.
301 Mass. 133,134-135. See also the provision of the code found in G. L. c. 106, § 2-703 (a).
3. The auditor based his conclusion that the making of the Colona TV commercial was not authorized by Specialties on the subsidiary facts “previously found.” The trial
judge arrived at a different conclusion upon the same facts. The auditor’s report constitutes “in effect a case stated, upon which it was the duty of the judge, and is now our duty, to enter the correct judgment.”
Wasserman
v.
Roach,
336 Mass. 564, 567. The trial judge was not bound, and we are not bound, to draw the same inferences and to reach the same conclusions as the auditor upon the subsidiary findings.
United States Fid. & Guar. Co.
v.
English Constr. Co.
303 Mass. 105, 108-109.
Union Old Lowell Natl. Bank
v.
Paine,
318 Mass. 313, 315-316.
Despite the auditor’s finding that it “was the custom in the trade for the customer to be informed” of the estimated cost “before a TV commercial was made,” we reach the same conclusions reached by the trial judge, viz. that the Colona commercial was authorized by Price and that Specialties is liable for the unpaid balance of $3,821.80. The initial discussion of the commercial was general in terms. Neither party was precise. There was, however, no adequate price restriction or condition imposed by Specialties with respect to the authorization. Price failed, on the day before the commercial was made, to ask about the cost. Dowd never withdrew its invoice, although it did not press for its payment, perhaps in the hope that later use of the commercial film would change Price’s attitude. Nothing in the subsidiary findings leads us to conclude that the Dowd representatives intentionally or fraudulently withheld from Price information that the price was to be higher than even the Dowd group had originally expected.
4. The evidence of commissions for a comparable period in 1955 was admissible to prove Dowd’s loss because Specialties ceased prematurely to place advertising through Dowd. See
Orbach
v.
Paramount Pictures Corp.
233 Mass. 281, 285;
Galvin
v.
Nutting-Pillman Amusement Co.
284 Mass. 314, 315;
Rooney
v.
Weeks,
290 Mass. 18, 30. See also
Nelson Theatre Co.
v.
Nelson,
216 Mass. 30, 35-36;
Hawkins
v.
Jamrog,
277 Mass. 540, 543-545. This evidence, especially if taken with evidence referred to in the record (but not reproduced) about the whole volume of advertís
ing during the contract period, provided a sufficient basis for the auditor’s conclusion that the damages arising from Specialties’ breach of contract would not be less than the commissions earned in 1955. The evidence was neither too remote nor too speculative. See
Randall
v.
Peerless Motor Car Co.
212 Mass. 352, 379-382. Cf.
Durfee
v.
Durfee & Canning, Inc.
323 Mass. 187, 204-205. The burden was on Specialties to show any reduction in damages properly attributable to the probable cost to Dowd of earning the lost commissions.
McNally
v.
Schell,
293 Mass. 356,360.
5. The trial judge incorrectly struck from the auditor’s report a finding that “the portion of the Colona contract . . . properly attributable to” the period from November 13, 1956 (the date as of which the auditor treated the Dowd contract as terminated, approximately ninety days after the notice of August 13), and April 30, 1957 (when Specialties’ contract with Colona for use of his picture and indorsement of the pizza pie mix ended), “was $3,600 and that . . . Specialties ... is entitled to recover this sum from Dowd,” because, in substance, “Specialties . . . was prevented from making use of the Colona advertising . . . prepared by Dowd” during this period. Consequential damages, including loss of use during any period of detention, resulting from and caused by a conversion are recoverable in appropriate cases.
Jackson
v.
Innes,
231 Mass. 558, 560.
Manhattan Clothing Co. Inc.
v.
Goldberg,
322 Mass. 472, 476. Restatement: Torts, § 927 (b) and comment 1. Harper and James, Torts, § 2.36 at pp. 191-192. McCormick, Damages, 466-467. The auditor allowed Specialties to recover the full value of the property treated by him as converted (which, of course, did not include the TV spots) and also special damages for deprivation of the opportunity of using the remaining value in the Colona contract. Cf.
P. A. Dolan Co.
v.
P. S. Thorsen Co. of Mass.
324 Mass. 376, 378-379. The somewhat abbreviated findings on this point necessarily imply that the conversion caused each of these separate elements of damage. We cannot go behind these findings. Recovery of the $3,600 item must be allowed.
6. Judgment is to be entered for Specialties in the action against Dowd in the amount of $13,419.70 plus interest from the date of the writ on count 1 and on count 2, which are for the same cause of action. The order for judgment for Dowd on count 3 is affirmed. In the case brought against Specialties the order for judgment for Dowd in the amount of $12,916.59 plus interest from the date of the writ is affirmed.
So ordered.