Where, in an action by a real estate broker for commissions, it was contended by him that he did not bind himself to sell the property or to furnish a purchaser, as contended by defendant, but he was to be paid if he simply introduced a person to whom a sale should be subsequently made by defendants. an instruction requested by defendants applying the general rule that a real estate broker employed to sell lands must bring about a sale or procure a purchaser ready, willing and able to purchase, not based on the hypothesis that the jury must first believe the contract to be as contended by defendants, was properly refused. Mayer v. McCann, 136 I11. App. 50, affirmed in McCann v. Mayer, 232 I11. 507, 83 N. E. 1042.