In an action for a broker's commissions, declarations of defendant's agents as to the broker's commissions, made at the time they were negotiating and closing the deal with the purchaser found by the broker, are admissible as part of the res gestae. Fritz v. Chicago Grain & Ele. Co., 136 Iowa, 699, 114 N. W. 193; Donnder Petroleum Co. v. Clay, 267 F. 45. Mechem on Ag., Sec. 715.