PERDURABLE

As applied to an estate, perdurable signifies lasting long or forever. Thus, a di eisor or tenant in fee upon condition has as high and great an estate as the rightful owner or tenant in fee-simple absolute, but not so perdurable. The term is chiefly used with reference to the extinguishment of rights by unity of seisin, which does not take place unle both the right and the land out of which it i ues are held for equal• ly high and perdurable estates. Co. Litt. 813a, 313b; Gale, Easem. 582; Sweet. I [s. 897]