In an action for commissions by a person engaged to secure title to certain mining properties, where defendant's answer averred that he had taken no part in the transaction involving their subsequent purchase by another person, and plaintiff had testified that he would not be entitled to commissions had the person obtaining the purchase dealt with persons other than defendant, evidence of the person who purchased the claims that defendant had no part in the transaction, was admissible. Bailey v. Carlton, 43 Colo. 4, 95 P. 542.