Where the owner of land authorized real estate agents to sell land purchased by him, and informed them that he had no deed for the same, but held it under a contract, and the agents made a contract for the sale of the land, but the purchaser refused to complete, because the vendor had only a contract of purchase, there being no other defect in the title, it was held that the agents were not entitled to recover the agreed commissions on the sale, as it proved abortive without any fault on the part of their principal. Hoyt v. Shipherd, 70 I11. 309; compare Sec. 87.