Plaintiff can not recover on proof of a contract other than that declared on. Daley v. Russ, 86 Cal. 114, 24 P. 867; Kidman v. Garrison, 122 Iowa, 215, 97 N. W. 1078; Jones v. Pendleton, 134 Mich. 460, 96 N. W. 574; Brady v. Barnett, 34 Tex. Civ. App. 433, 78 S. W. 965.