delivered the opinion of the Court at the ensuing term in Penobscot.
The nature of the transactions in which agents are engaged, being frequently such that the contracts they make for others cannot he proved without the agent’s testimony, they are considered as competent witnesses on the ground of necessity. It is the constant practice to admit them to be witnesses for their principals, in order *444to prove contracts made by them ; and every person who makes a contract for another is an agent within the meaning of the rule. 1 Phil. Ev. 99. By their own testimony they may prove their agency, excepting where the appointment was in writing; and, with few exceptions, miiy. be called as witnesses generally, either for or against their principals. Fisher v. Willard, 13 Mass. 379; 2 Stark. Ev. 54.
Ehenezer H. Judkins was, therefore, a competent witness. By his testimony it was proved that the oxen sold to Young were the plaintiff’s, and were sold by his direction to raise money to pay the defendant’s note; that the defendant received the. note against Young, knowing that it was the plaintiff’s property, and with the full knowledge that the witness acted as the plaintiff’s agent.
It is incumbent on a party dealing with a special agent to inquire and ascertain the extent of his authority. Chitty on Contr. 58; Schimelpennick v. Bayard, 1 Pet. 290. Now whatever might have been the tenor o£ the defendant’s promise, whether to account with the plaintiff or the witness, if the Young note was actually the plaintiff’s property and the defendant knew it, and also knew that it tyas entrusted to the witness as. an agent appointed for the special purpose of negotiating with the defendant in payment of his note against the plaintiff, the defendant could not acquire an interest in the Young note in any other manner -than that prescribed to the agent by his principal. An agent constituted for a particular purpose and under a limited power cannot bind his principal, if he exceed his power. It is well settled law that whoever deals with such an agent, deals at his peril, when the agent passes the precise limits of his power. 2 Kent's Com. 484. Any contract, therefore, which the defendant might have made with the plaintiff’s agent, could not so avail him as to defeat the plaintiff’s rights. Even a noté taken in the name of the agent, if identified as taken for the goods of the principal, may be recovered by him as his property. Thompson v. Perkins, 3 Mason, 241.
It has been shown that the wdtness was competent to. prove his agency, and if so,. then to prove whether it was general or special. *445He was also competent to prove that lie notified the defendant of Ills agency and its character, and of the plaintiff’s interest in the note; and when once these facts are established, as they were, no arrangement which the agent and defendant could make would divest the plaintiff of his interest in the note, unless such arrangement conformed to the power under which the agent acted.
The principle recognized in the cases cited by the defendant’s counsel is that where one contracts as agent for another, if he would avoid being personally liable, the contract itself must shew the character in which he contracts, and that he does not intend to bind himself. But no case has been cited which sanctions the contract of an agent made in violation of his authority to the prejudice of his principal, where the person contracted with had knowledge that the agent’s powers did not authorize such contract.
It is to be kept in mind that this action was not brought on any written contract, and that no attempt was made to vary or explain such a contract by parol evidence. The parol evidence was offered to prove the plaintiff’s property in the Young note, that the witness was the plaintiff’s agent, the character and extent of the authority with which he was invested, and that the capacity in which lie acted was known to the defendant. These facts might bo inconsistent with the contract actually made between the witness and defendant, but they go not to vary or explain that contract, but only to show that the witness was not authorized, as the plaintiff’s agent, to make it. The receipt was offered in evidence by the defendant, and so far as it had a tendency to contradict or throw suspicion on the testimony of the witness it was properly offered, hut that it could uncontrollably bind the rights of the plaintiff is not admitted.
The decision of Snow v. Perry, 9 Pick. 539, depended upon principles applicable to this case. Perry sent bank bills by a special agent to pay Snow a note which he held against Perry, with directions to the agent to see them endorsed on tho note or lake a receipt for the same. The agent took Snow’s receipt promising to endorse the bills on the note, or return them when called for. The agent was permitted to testify that Snow, who was from home when-*446he received the bills, promised to endorse them on the note when he should return home at evening. The court held that the agent, in taking a conditional receipt, exceeded his authority, and that the acceptance of the bills by Snow was to be considered as payment of the note.
In the case at bar, the receipt was surely calculated to produce doubt of the correctness of Ebenezer H. Judkins's testimony relating to the particular agreement between him and the defendant, and consequently to weaken the force of his testimony upon other points. But the Judge submitted all these considerations- to the jury, where they properly belonged. His instructions were’even more favorable for the defendant than he could have properly requested. The jury were instructed, substantially, not to find for the plaintiff unless they believed the defendant knew that the note against Young was the property of the plaintiff, and that Ebenezer was acting for and as agent of the plaintiff, and also believed the testimony of Ebenezer as to his agreement with the defendant. If there be any cause to complain of the instructions of the Judge, it is with the plaintiff, for the latter clause, from which the jury might, perhaps, infer that the plaintiff would be bound by the agreement between his special agent and the defendant^ although the latter knew that the former had exceeded his authority and violated his trust.
It is not our business to reconcile the discrepancy in the testimony, or inquire into the nature of the transaction between the witness and the defendant. Whether the former has testified erroneously as to the owner of the oxen and the Young note, his agency and the arrangement with the defendant; or whether the receipt was improperly drawn by the defendant for the purpose of accomplishing some object not disclosed in the case,, we are not called upon to decide.
The witness has testified apparently against his own interest, and proof of his testimony will protect the defendant from any action that the witness may bring on the receipt; the jury have believed him, and we do not perceive any legal ground for disturbing their verdict. The exceptions are overruled.