A real estate agent who secretly undertakes to represent both parties, is not permitted to recover commissions from either. Williams v. Moore-Gaunt Co., 3 Ga. App. 756, 60 S. E. 372; Hess v. Gallagher, 117 N Y. S. 960; John v. Thrower, 75 S. E. 819, 11 Ga. App. 494; Welch v. Garrett Biblical Ins., 186 I11. App. 191; Wheeler v. Lawler, 110 N. E. 273, 222 Mass. 210; Cohn v. Cohen, 157 N. Y. Sup. 125; Crawford v. Surety Inv. Co., 139 P. 481, 91 Kan. 748; Maddux v. St. Louis Union Trust Co., 171 S. W. 669, 186 Mo. App. 138. See also Sec. 314.