Where the language used by the owner, in conference with the broker, and the attending circumstances, were such as to justify the broker in believing that an extension of time in which to make the sale was given, and he acted on such belief, the owner is bound by the legitimate effect of his language and acts, rather than by his own understanding of their import. Hancock v. Stacey (Tex. Sup. '10), 125 S. W. 884.