Whether the defendant prevented a sale, an exchange, a lease or a loan is for the jury to determine. McDermott v. Mahoney, 119 Iowa, 470, 93 N. W. 499; Wright v. Young, 176 Mass. 100, 57 N. E. 212; Green v. Wright, 36 .Mo. App. 298; Hancock v. Stacey (Tex. Civ. App. '09), 116 S. W. 177; Longworth v. Stevens, 145 S. W. 257, - Tex. Civ. App. -; White v. Erickson, 169 N. W. 535, - Minn. Sup. -; Stewart v. Chittack, 222 S. W. 863, Mo. App. -; Baskett v. Jones, 225 S. W. 158, - Ky. Ct. App. -; Holt v. Calavay, 226 S. W. 179, - Ark Sup. - .

see, 891a. Whether under the contract the broker's commissions were not to become due until a lease had been signed by the parties was a question for the jury.

In an action by a broker for commissions, evidence examined and held that, whether there was a contract between the parties by which plaintiff's commission was not to become due until there had been a lease signed by the parties was a question for the jury. Benedict v. Pincus, 95 N. Y. S. 1042, 109 App. Div. 20. Also, as to whether commissions were to be paid before title passed.. Dekremen v. Clothier, 96 N. Y. S. 525, 109 App. Div. 481.