While the acts of a purchaser procured by a broker employed to obtain a purchaser subsequent to the time fixed for the performance of the contract can not affect the rights of the broker to his commissions, such acts may be looked to to determine whether what the purchaser did to establish the broker's rights was done in good faith, and whether such prior acts had the legal effect claimed for them. Little v. Herzinger, 34 Utah, 337, 97 P. 639.