Where a broker who received a proposition to sell defendant's land did not accept it until after the expiration of the time designated in the offer for its acceptance, he is not entitled to commissions on the making of the sale. Short v. Willing, 1 Weekly Notes of Cas. (Pa.), 460; Drew v. Gone, 91 S. E. 1068, 10 Ga. App. 704. See also Secs. 235, 431, 471.