Where real estate was placed in the hands of brokers for sale, and they purchased it from the agent of the owner with power to sell, such agent had no legal right to retain commissions out of the price received, in the absence of a specific agreement to that effect. Knott v. Midkiff, 114 La. 234, 38 S. 153. See also Sec. 285, and references under Sec. 307.