In an action by a broker for his commissions for securing a purchaser, evidence examined and held sufficient to take to the jury the question whether the failure of the consummation of the sale was owing to the default of the principal. Seidman v. Banner, 99 N. Y. S. 862, 51 Misc. 10; Ingalls v. Smith, 145 P. 846, 93 Kan. 814; Knight v. Brown, 147 N. Y. Sup. 628, 162 App. Div. 438.