The terms of a contract of employment may be modified by a subsequent agreement, express or implied, the same as any other contract, in which case the broker's right to compensation depends upon the modified terms. Cornell v. Hanna (Kan. App. '98), 53 P. 790; Deford v. Shepard, 6 Kan. App. 428, 49 P. 795; May v. Schuyler, 43 N. Y. Super. Ct. 95; Martin v. Crumb, I11 N. E. 62, 216 N. Y. 500, rev. judg., 142 N. Y. Sup. 1096, 158 App. Div. 228, app. to Ct. App. and re. den., 143 N. Y. Sup. 1130, 158 App. Div. 939; Hamilton v. Hathaway, 133 S. W. 629, 152 Mo. App. 483; Schano v. Storch, 137 N. Y. Sup. 26, 56 Misc. Rep. 484; Webb v. Harding, 211 S. W. 927, aff. judg., 159 S. W. 1129, - Tex. Civ. App. -; Greene v. Minn. Billiard Co., 176 N. W. 239, - Wis. Sup. -; Thornburg v. Haun, 190 P. 1083, - Okl. Sup. -; Chandler v. Gaines-Ferguson Realty Co., 224 S. W. 484, - Ark. Sup. -; Fisher v. Skidmore Land Co., 179 N. W. 152, - Iowa Sup. - .