The defendant admitted the execution of the written contract, which was introduced in evidence. Among other stipulations therein are these: “This order shall become a contract between the purchaser and the company upon acceptance thereof in the space below by one of the officers of said company; it being understood that this statement, upon such acceptance, covers all of the agreements between the purchaser and -the company, and that no agent or representative of the company has made any statement or verbal agreement modifying or adding to the terms and conditions herein set forth. It is further understood that upon acceptance of this order, the contract so made cannot be canceled or revoked by either party, nor may it be altered or modified by any agent of the company, or in any manner except by agreement in writing between the purchaser and the company acting by one of its officers.” The defendant did not allege fraud or mistake, or any other equitable defense in her answer, but alleged only the plaintiff’s breach of contract to install the machinery. For the purpose of showing such breach, the defendant was permitted to offer proof that the plaintiff’s agent delivered to her an unsigned paper-writing and told her it was a copy of the written contract; and that this paper contained the item, “Installing, $35,” which is not in the original order. She was permitted *139to introduce also certain of ber letters addressed to tbe plaintiff charging it with a breach of contract in failing to set up the generator and appliances at her dwelling. To the admission of this evidence the defendant excepted.
The exception, in our opinion, should have been sustained. The defendant has not alleged that she is entitled to the cancellation of her contract on the ground that she was deceived by the plaintiff’s agent, and thereby lulled into security. Having signed the contract, she is presumed to have read it, and is bound by its terms. Dellinger v. Gillespie, 118 N. C., 737; Griffin v. Lumber Co., 140 N. C., 520; Medicine Co. v. Mizell, 148 N. C., 384; Leonard v. Power Co., 155 N. C., 17; Taylor v. Edmunds, 176 N. C., 327.
Since the defendant is bound by her written contract, it is apparent that she cannot offer evidence to alter, vary, or contradict its provisions. She expressly stipulated that her written order should cover all the agreements between her and the plaintiff, and that the agent neither had made nor should make any verbal agreement modifying or adding to its contents. If the agent gave her an unsigned paper with a stipulation not appearing in the contract she had executed, the plaintiff was not bound by the agent’s unauthorized agreement, because not only was the agent’s authority limited, but the defendant in express terms assented to the limitation. It is true that a restriction on an agent’s powers ordinarily may be waived; but even then the burden rests on the party claiming the waiver to show that it was within the scope of the agent’s authority, and it must be shown, not by the agent’s declaration, but aliunde. In the ease at bar the language used in Medicine Co. v. Mizell, supra, may appropriately be employed: “But it is positively stated in the order that there is no agreement, verbal or otherwise, affecting the terms of the order, except the one expressed therein, and to this the defendant freely assented by signing the written instrument. The well settled rule of law forbids him now to show the contrary by oral testimony.” Moffitt v. Maness, 102 N. C., 457; Taylor v. Hunt, 118 N. C., 168; Walker v. Venters, 148 N. C., 388; Basnight v. Jobbing Co., 148 N. C., 350; Walker v. Cooper, 150 N. C., 129; Woodson v. Beck, 151 N. C., 145.
For error in the admission of incompetent evidence, the plaintiff is entitled to a new trial. Let this be certified.
New trial.