This is an action of contract to recover a balance alleged to be due for work done on the Brimmer School building, partly under a written contract and partly claimed to be for extras. The only controversy relates to extras. The plaintiff entered into a contract with the defendant, executed on its behalf by the school house commissioners and approved by the mayor. The contract contained, among other provisions not now material, a clause to'the effect that the work should be performed according to the specifications except “that the city, by order in writing of the architect . . . may change, increase or take away any part of the work, or change the specifications, plans, drawings, form or materials thereof, or require the contractor ... to finish any extra labor relating thereto.”
Article 3. “The contractor shall, within one week after any order shall be given as aforesaid, . . . deliver to . . . the architect copies of such order, . . . and of the items and cause thereof; and no sum shall be allowed on account of any such order, . . . unless a copy or a statement, as aforesaid, is so delivered to the officer and another to the architect, or the mayor shall approve the sum.”
No written order was given by any one representing the defendant to the plaintiff for the extras for which claim now is made, and the mayor has not approved the extras.
Plainly the plaintiff has no remedy for the alleged extras under the terms of his contract. That contract has not been complied with in that no written order was given by the architect, neither did the contractor give any statement as required by Article 3 of the contract. Nor has the mayor approved the sum claimed for extras. The plaintiff cannot recover on the ground that the contract was modified or waived unless by showing that the parties to the contract have modified or waived its provisions. The representatives of the defendant in mating this contract were not alone the school house commissioners, but the school house commissioners and the mayor acting together. As the plaintiff offered no evidence that the mayor had waived any terms of the contract, *473he cannot recover on the ground of waiver. The school house commissioners are not, under the statute and the form of contract in the case at bar, clothed with power to waive the provisions of the contract without the concurrence of the mayor. This case is governed in principle by Cashman v. Boston, 190 Mass. 215.
Exceptions overruled.