The state of a person who does not speak, or of one who refrains from speaking. In the law of estoppel, “silence” implies knowledge and an opportunity to act upon it. Pence v. Langdon, 09 U. S. 581, 25 L. Ed. 420: Stewart v. Wyoming Cattle Ranch Co., 128 U. S. 383. 9 Sup. Ct. 101, 32 L. Ed. 439; Chicora Fertilizer Co. v. Dunan, 91 Md. 144, 46 Atl. 347, 50 L. R. A. 401. Silent leges inter arma. The power of law is suspended during war. Racon.