Defendant, a real estate agent, contracted with plaintiff, also a real estate agent, to pay plaintiff $1.25 per acre, or one-half of all commissions made by defendant, on all lands sold to purchasers brought to defendant's office by plaintiff, such commissions to be paid to plaintiff as soon as the defendant should receive his commissions from said sales, and that plaintiff would bring all his land buyers to defendant. Held, that under the contract plaintiff's right to compensation was not limited to sales made in which commissions were actually paid in money and received by defendant, but if a sale were made by defendant so that commissions could not be collected on the sale, plaintiff would be entitled to compensation at the rate of $1.25 per acre on the land sold, and was entitled to such compensation under the contract where defendant himself purchased land of a third person, and subsequently entered into a binding contract for sale thereof with a purchaser furnished by plaintiff. Park v. McCul-ley, 131 N. W. 509, 27 S. D. 493.