cies of freehold estate in lands, otherwise called a “fee,” where the tenant is not only entitled to enjoy the land for his own life, but where, after his death, it is cast by the law upon the persons who successively represent him in perpetuum, in right of blood, according to a certain established order of descent. 1 Steph. Comm. 218; Litt. §1; Nellis v. Munson, 108 N. Y. 453, 15 N. E. 739;