The principal question in this case is governed by the decisions of this court in Cummings v. Arnold, 3 Met. 486, and Stearns v. Hall, 9 Cush. 31; in both of which the doctrine was recognized and affirmed, that where a written contract within the statute of frauds has been varied by a subsequent paroi agreement, affecting the mode of performance only, the action can be maintained only upon the written contract; because to allow a party to sue partly on a written and partly on an oral agreement would be in direct contravention of the statute. But it was further held in Cummings v. Arnold that, in defence to an action on the written contract, the defendant may show that he has performed it according to an oral agreement for a substituted performance, or, being ready to do so, was prevented by the act of the plaintiff. And in Stearns v. Hall a plaintiff who declared upon the original contract in writing was allowed to prove, in answer to the defence that he had not performed the contract according to its terms, that a different performance had been agreed to be substituted by paroi, and that he had performed or had been ready to perform the substiuted agreement. The whole doctrine is well stated, and the authorities collected and reviewed, in Browne on St. of Frauds, (2d ed.) §§ 409-428.
The plaintiffs might therefore maintain this action upon a declaration framed upon the written contract, and the substituted performance agreed on would not avail the defendants, as *328they have not done, or offered to do, what it required. Lerned v Wannemacher, 9 Allen, 412.
On examining the declaration, it appears that the written con tract is set forth, and a substantial breach of it; but the plaintiffs go further, and allege the extension of the contract time by agreement of the parties, and a breach of the new agreement, Whether the new agreement was in writing is not averred, but the evidence showed it to have been made by paroi.
It may be questionable whether there was anything erroneous or fatally defective in the declaration. It set forth a good cause of action, and conformed to the truth of the case. The plaintiffs could not know that the defendants would rely upon the statute of frauds. When they did rely on it, the declaration could have been amended by striking out the latter averments, if an amendment was necessary. But the ruling that the plaintiffs could not recover upon the declaration without proof that there was an agreement for an extension of the time of performance was made at the request of the defendants, and is not excepted to; and we allude to it only because it may be material upon a new trial.
The defendants then asked for the instruction “ that if the jury should find that there was a paroi agreement for an extension of the written contract, the plaintiffs could not recover upon such paroi agreement, because the same is not in writing.” This instruction, which was refused by the court, ought to have been given; and upon this point the exceptions are sustained, and a new trial granted.
This ruling shows the other exceptions to be immaterial. The evidence as to damages related to the price of the brick at the time of the defendants’ final refusal to deliver them in the spring which was not the time subject of inquiry. The question should have been as to the damages sustained at the time the written contract was broken. So it is unnecessary to decide whether the paroi agreement was shown to be an extension of the time of delivery to the opening of navigation, or until the date of the writ.
Exceptions sustained.