An impression upon wax, wafer, or some other tenacious substance capable of being impressed. Allen v. Sullivan R. Co., 32 N. H. 449; Solon v. Williamsburgh Sav. Rank, 114 N. Y. 132, 21 N. E. 168; Alt v. Stoker, 127 Mo. 471, 30 S. W. 132; Bradford v. Randall, 5 Pick. (Mass.) 497; Osborn v. Kistler, 35 Ohio St. 102; Hopewell Tp. v. Amwell Tp., 6 N. J. Law, 175; Jones v. Logwood, 1 Wash. (Va.) 43. A seal is a particular sign, made to attest In the most formal manner, the execution of an instrument. Code Civ. Proc. Cal.