A broker employed to procure a purchaser of real estate under a contract which does not specify the time for the performance of the contract must, in an action for his commissions, prove that he performed it within a reasonable time. Harris v. Moore, 134 Iowa 704, 112 N. W. 163; Hurst v. Williams, 31 Ky. L. R. 658, 102 S. W. 1176. On acceptance immaterial. Moore v. Boehm, 91 N. Y. S. 125, 45 Misc. 622.