“A rule was obtained at the October term, in 1803, to set aside the nonsuit entered in this cause; and the question now came on to be argued . . . in an ejectment, the plaintiff must show, and it is enough for his purpose, if he does show a right of entry; or, in other words, a right of possession. If he prove twenty years’ possession, or the seisin of his ancestor, and a descent cast, it is in general sufficient, prima facie, unless the defendant show a better right. But the defendant may succeed, by showing a better right in himself, or, by showing it out of the plaintiff.”