Where plaintiff claims to have been employed as broker by the husband as agent of defendant, any competent evidence is admissible which tends to show that the husband had authority to employ a broker on behalf of his wife. Eichberg v. Ware, 92 Ga. 508, 17 S. E. 770; Hall v. Grace, 179 Mass. 400, 60 N. E. 932; Darling v. Howe, 14 N. Y. S. 561, 60 Hun, 578.