Appellee instituted this action against appellant to recover damages sustained by reason of the breach of an alleged contract of employment, in consideration of the execution of a right-of-way deed. Appellee alleged in his complaint that he joined in the execution to appellant of a right-of-way deed through and over certain lands of the grantors, and that as a part of the consideration for the execution of the deed appellant agreed to employ him as brakeman at a salary of at least $50.00 a month, for and during his lifetijne, or as long as he was physically able and willing to give the service. Appellant 'denied the agreement and the cause was tried before a jury upon that issue,, the trial resulting in a judgment in favor of appellee for the recovery of damages on account of the breach of the contract. The deed recited a consideration of $1.00, paid, and contained the following provision, which was inserted after the description of the land, and preceding the habendum clause, towit:
“Provided said railway company shall give the said Cunningham position as brakeman (regular work) salary not less than $50.00 per month.”
Appellee was permitted to testify, over objections interposed by counsel for appellant, that the person who solicited him to execute the right-of-way deed, and who procured the same for appellant, entered into an oral agreement with him in consideration of the execution of the deed, that the company would give him a job as brakeman, at a salary of $50.00 per month, and that “I was to have the job as long as I was physically able and willing to give the service.” The ruling of the court in permitting the evidence is assigned as error. We are of the opinion that this assignment of error is well founded, as the testimony was incompetent for the reason that it is violative of the rule against the admission of oral testimony to alter or extend the terms of a written contract. Counsel for appellee defend the ruling of *349the court in reliance on some of our cases which hold that the rules of evidence are not violated in permitting oral testimony to establish an additional consideration for the execution of a deed or contract. Kelly v. Carter, 55 Ark. 112; St. Louis & North Arkansas Rd. Co. v. Crandell, 75 Ark. 90; Magill Lumber Co. v. Lane-White Lumber Co., 90 Ark. 426.
The doctrine of those cases is, however, that the recitals of a deed concerning consideration do not form a part of the contract itself, and that it does not operate as a variance of the terms of a contract to prove an independent consideration. The difficulty of applying that doctrine to the present case lies in the fact that the parties introduced into the writing the contract concerning this additional consideration, and, as that contract is complete in itself, it would necessarily operate as an alteration to prove additional terms by oral testimony. The written contract contains no definite specifications’ as to duration, but that must be determined by construction of the language used, and it would undoubtedly constitute an alteration of the writing to permit oral testimony to establish the duration of the period of service provided for in the contract. The,, contract does not specify, as has been done in some cases, hiring for life, or for permanent employment, as in others, or, as in still others, for employment at the will of the party who is to give the service, but it merely specified that appellant should give him a “position as brakeman,” with the further specification of a minimum monthly salary. Such contracts are generally upheld, for, there being an independent consideration, it is not essential that there should be mutuality in the contract for hire. 1 Labatt’s Master and Servant, § 88. The contract in the present case can only be construed to provide for hiring, not at the will of one of the parties, but at the will of both, and in this respect it differs from contracts which uro vide for service as long as the persons to be hired are willing, to serve. It being for an indefinite period, it must be *350construed as being terminable at the will of either party. Fulkerson v. Western Union Tel. Co., 110 Ark. 144. Of course, a discharge after service for only a day or a weelsj- or perhaps for a month, might be treated as an evasion of the contract, but since no time is specified in the contract, a hiring for any substantial length of time, and a refusal to give employment for a further time, would not constitute a breach.
There is no contention in the present case that thero was an evasion of the contract by mere nominal employment, for according to the undisputed evidence, plaintiff was employed for a year and a half, and until appellant sold its road to another corporation. Appellee continued in the employment of appellant’s successor in the same capacity for a short time and was then discharged.
Therefore, according to the undisputed evidence, there was no breach of the written contract, and since appellant is not permitted under established rules of evidence to vary or extend the terms of that contract, it follows that he has not made out a case for recovery of damages. The judgment is reversed and the cause is dismissed.