Prayers in an action by a real estate broker to recover from other brokers for a commission received by them from the sale of a lot that if the court found that there was no agreement to make any division of the commissions then the verdict must be for plaintiff, whether or not plaintiff was a licensed real estate broker, and that if plaintiff introduced the purchaser to defendants or those for whom they acted, and gave defendants notice of the negotiations between plaintiff and the subsequent purchaser and a sale was made to such purchaser as the result of the introduction by plaintiff, the verdict must be for plaintiff, and that if a sale was made through the bringing of the parties together by plaintiff then plaintiff was entitled to recover, even though the sale may have been effected by a direct agreement between the defendant and the purchaser, fully submitted the two contentions of plaintiff that there was an express agreement to divide the commissions, and that if there was no express agreement plaintiff was the procuring cause of the sale made. Walker v. Baldwin, 106 Md. 619, 68 A. 25.