Where a broker sued on an express contract for commissions, alleging that he was the procuring cause of the sale and was entitled to his commissions, whether title to all the land failed or not, and testified that he agreed to sell the whole ranch, and that, unless the title to the land was clear, the ranch could not be sold at the price, but did not prove the case alleged, and could not recover. Jackson v. Blair, 165 S. W. 522; - Tex. Civ. App. - .