By the Court,
Miller, J.According to the agreement, as found by the referee, the plaintiff was to leave a hand on the boat to take care of it. As the person employed had left, and no one remained, and no one was designated in season by the plaintiff, I think the defendants’ agent was authorized, temporarily, at least, to employ a proper person for that purpose. Whether he should not have discharged the person thus employed, after the plaintiff’s letter was received requesting him to let Beals take charge of the boat, or after *66Eeals had called and offered to do so, is perhaps unnecessary to consider, for as Daniels had authority to employ a person, under the circumstances existing, the main question in reference to this branch of the case is, as to the rate of compensation which should be allowed the defendants for thus • ' providing a person to perform the service. The referee has found that the sum paid by the defendants was more than it was reasonably worth, its reasonable worth not exceeding the sum of $20. Some of the witnesses testify that it was worth not to exceed $15 or $20, and there is certainly considerable' evidence to support the referee’s finding. ^-Although the defendants were justified in employing a man for that purpose, they'were'not -authorized to pay an"exorbit¥fff'|ñÍUé7'afid if they did so, it was at their peril. While the plaintiff would be liable for all ordinary expenses incurred in thus taking care of the boat and cargo, and for what it was really and fairly worth, he should not be 2nade liable beyond that. What the price should be was a question of fact, in regard to which the testimony was somewhat conflicting, and the decision of the referee is not so entirely against the weight of the testimony as to justify this court in setting the report ■ aside on that account.
It is objected that, there being an entire contract that the plaintiff should hold the oats and keep a man to stay on board and take charge of them, his failure, to keep a man on board creates a breach of contract, which prevents his right to compensation. This objection was not taken on the trial, either on the motion for a nonsuit or in any other stage of the case. The parties appeared to act upon the theory that if this was the contract, a technical performance in this particular was waived by the defendants. As it was an objection which might perhaps have been obviated, if made in due season, and as the parties assumed that no such difficulty existed in the case, I am inclined to think that it is not now available. But even if the objection is now properly presented for consideration, I entertain serious doubt whether *67the mere fact of the man employed leaving the boat when the plaintiff had employed another person, who was ready to take the place of the one who had left, when called upon, would prevent a recovery, especially as .the defendants’ agent and the plaintiff had a correspondence in reference to the man leaving, and the plaintiff directed him to let Reals take possession, or to put some one else in charge, and what was done seemed to have been carried out in this respect by the assent of the parties.
I think the objection urged, that the receipt given by the plaintiff was a bar to this claim, is not well founded. The testimony accompanying the receipt, and which was introduced by the defendants, establishes that the receipt was given for the balance of the freight. The case was tried upon this hypothesis, and the defendants did not claim, nor ask the referee to find, otherwise. It was assumed on the trial, that such was the fact. And when the case is disposed of upon such an assumption, the non-existence of the fact in the case presented to the court on a motion for a new trial, cannot be urged in opposition to the application for a new trial. ■ (The People v. Cook, 8 N. Y. Rep. 78. Smith v. Hill, 22 Barb. 656.) If the objection had been taken on the trial, it might perhaps have been obviated. It might have been proved that the receipt was obtained by fraud, or there might have been some proper explanation of it. As it was, with the findings of the referee in regard to it, and no requests to find, I think the defendant is concluded.
The evidence of the value of the use of the boat was properly received. The witnesses, who testified upon this subject, had knowledge and experience as to the subject matter in regard to which they were examined, and gave evidence as to facts within their knowledge, and I think were competent witnesses for that purpose,
The request of the defendant’s counsel, to find that it was worth one dollar a day to take care of a single boat, in the *68condition in which the plaintiff's boat was left, and that boats could only be cared for at $20 each, when one person had a large number to care for at the same place, I think was not material. It could not affect °the question what the actual value of the services performéd was, and was therefore properly refused by the referee.
The referee committed no error, I think, in* refusing to find that it was the general custom in and about the port of Hew York, when the owner of freight takes charge of the boat and pays all the expenses during the winter, to deliver the boat to the owner in the spring free of charge, that no charge is made for the use of the boat; and that boats could have been procured on those terms, in which to store the oats. There was some proof of such a usage, but it was mainly confined to the knowledge and experience of two witnesses who had been in the practice of leaving their boats without charge for the use of the same. One of these testified that the boat is unloaded and delivered in the spring, without charge for its use, the one being set-off as an equivalent for the other. The proof was not enough to establish a general custom beyond any question. At least there was no evidence that the plaintiff knew, or even had heard of this usage. This would, I think, render the usage inoperative, so far as the plaintiff was concerned. The rule is thus laid down: “ A custom, in order to become a part of a contract, must be so far established and so far known to the parties, that it must be supposed that their contract was made in reference to it. "For this purpose the custom must be established, and not casual—uniform and not varying—general and not personal, and known to the parties.” (2 Parsons on Cont. 53. Dawson v. Kittle, 4 Hill, 107. Ripley v. Ætna Ins. Co., 30 R. Y. Rep. 136.) There was not a particle' of evidence to prove that the plaintiff knmo of any such custom, and the proof did not, I think, come up to the standard of the, rule here laid down, Jfoy was there evidence sufficient to war*69rant a finding that Daniels could have hired boats on the terms indicated.
The request to find that at the time Daniels delivered the boat to the plaintiff he informed him of the amount of charges that he had paid on said boat, and for caring for the same after it was left, and the plaintiff made no objection, was not, I think, important as a distinct fact. The evidence on this subject only tended to establish that the defendant was not liable; and even if such a finding had been made, it probably would not have changed the result. There was evidence to show that the plaintiff!, at the time referred to, made a claim for the use of the boat, and it may be questionable whether the finding requested may not have been in conflict with such evidence. It was properly refused.
An exception is taken to. the allowance of interest, by the referee. The rule, as modified by recent decisions, allows interest upon an unliquidated demand, the amount of which could he ascertained by computation, together with a reference to well established market values, because such values are so nearly certain that it would be possible for the debtor to obtain some proximate knowledge of how much he was to pay. (McMahon v. The N. Y. and Erie R. R. Co., 20 N. Y. Rep. 469. Van Bensselaer v. Jewett, 2 Gomst. 135.) Within this rule, I think that interest was chargeable and properly allowed.
Independent of these considerations, it may he added that the defendants here were not in a position to avail themselves of this objection, for the reason that no exception was taken, specially, to the allowance of interest in the report of the referee.
The case shows an error of the referee in not allowing the defendants the sum of $45 proved to have been paid by the defendants for unloading the cargo of oats. One of the witnesses' testifies that it was custom for the captain to unload the freight, when he arrives, as a part of the transportation, and the referee has found that it was the duty of the *70plaintiff to unload the grain, as a part of the transportation. The plaintiff’s evidence does not contradict this view; and as the plaintiff did not unload the boat, and did not pay for unloading it, the amount actually paid out for that purpose should have been deducted from the plaintiff’s demand.
[Albany General Term, March 4, 1867.The judgment being erroneous in this respect, a new trial . must be granted, with costs to abide the event, unless the plaintiff shall consent to deduct that amount, with interest, from the recovery had; in which case, a new trial is denied. , No costs of the appeal should be allowed to either party, and the judgment affirmed.
Peckham, Miller and Hogeboom, Justices.]