delivered the opinion of the court.

The United States solicited sealed proposals .for the repair of a revetment in Michigan; and J. E. Hathaway & Company became the successful bidders. Under a contract, dated May 11, 1910, they agreed to complete the work by December 1, 1910. It was not completed until 68 days later. Of this delay the Government conceded that 29 days were attributable to extra work required by it, and 10 more days were not counted against the contractor, being Sundays and holidays. For the remaining 29 days’ delay the Government deducted from the contract price $3082; claiming that amount under the provisions for liquidated and other damages. To recover the amount disallowed, J. E. Hathaway & Company brought suit in the Court of[*463] Claims, which denied them relief (52 Ct. Clms. 267); and the case comes here on appeal.

First. Claimants contend that they were entitled to an extension of more than these 29 days’ time for completing the work; because the contract and fcycnd were delivered by them to the Government May "18, duly executed, but were not approved by the Chief of Engineers until June 9, and notice of approval was not given them until June 13. The origin of this delay was the failure of the surety company to file with the War Department a copy of the vote of its directors giving him who signed the bond as attorney in fact authority so to do. -But claimants insist that this omission could have been quickly supplied, if the Government had telegraphed for a copy of the vote, and that practically all the delay was due to its unreasonable failure so to do.

The Court of Claims found: ' ‘ There was no unreasonable-delay on the part of the Government in approving the contract.” This finding, like one of reasonable value, Talbert v. United States, 155 U. S. 45, 46, is a finding of an ultimate fact by which this court is bound, unless it appears that the finding was made without supporting evidence, Cramp & Sons Co. v. United States, 239 U. S. 221, 232; Stone v. United States, 164 U. S. 380; United States v. Clark, 96 U. S. 37, or is inconsistent with other facts found, United States v. Berdan FireArms Co., 156 U. S. 552, 573. There is no such lack of supporting evidence or inconsistency here. We have consequently no occasion to determine whether, as was held in American Dredging Co. v. United States, 49 Ct. Clms. 350, unreasonable delay on the part qf the Government. in approving a contract for an accepted bid can entitle the contractor to a corresponding extension of time, where a definite date is fixed by the contract for completion of the work. Compare Monroe v. United States, 184 U. S. 524. The case of District of Columbia [*464] v. Camden Iron Works, 181 U. S. 453, 461, strongly' relied upon by claimants, is clearly distinguishable. There the contract, as interpreted by the court, provided that the work should be completed, not (as here) by a date fixed, but within a certain number of days; and the number of, days was to be'measured, not from the date of the contract but from J‘ the date of the execution of the contract.” What was there-decided is merely that under such circumstances it may be “shown that a deed, bond or other instrument was in fact made, executed and delivered at a date subsequent to that stated on its face.”

Second. Claimants contend also that the Court of Claims erred in allowing, in addition to the sum of $100 a day as liquidated damages, the sum of $182 for the expense of superintendence and inspection. But the contract expressly provided that time should be deemed of the essence and that in case of failure to complete within the time specified “the contractor shall pay, in addition to the liquidated damages hereinbefore specified, all expenses for inspection and superintendence.” There is no reason why parties competent to contract may not agree that cei’tain elements of damage difficult to estimate shall be covered by a provision for liquidated damages and that other elements shall be ascertained in the usual manner. - Provisions of a- contract clearly expressed do not cease to be binding upon the parties, because they relate to the measure of damages. Wise v. United States, ante, 361.

Third. Claimants further contend that the credit of tune allowed by the Government on account of the extra work should have been greater. On this matter no issue appears to have been raised below; and it is obviously not open for review here.

The judgment of the Court of Claims is

Affirmed.