A broker is entitled to commissions where the principal sells before the expiration of the agency, without giving the broker notice of the sale. Woodall v. Foster, 91 Tenn. 195, 18 S. W. 241; Cadigan v. Crabtree, 186 Mass. 7, 70 N. E. 1033, 66 L. R. A. 982; Reishus-Remer Land Co. v. Benner, 91 Minn. 401, 98 N. W. 186; Payne v. Twitchell, 81 A. 350, 81 N. J. Law, 193; Mac-Bride v. Rogers, 85 A. 202, 83 N. J. Law, 407. (This is contrary to the doctrine that a sale puts an end to an agency, and if his contract has been violated the broker has a right of action for the breach.) See Sec. 15.