DETERMINABLE FEE. Also called a qualified or base fee, is one which has a
quality subjoined to it, and which must be determined whenever the
qualification annexed to it is at in end. A limitation to a man and his
heirs on the part of his father, affords an example of this species of
estate. Litt. Sec. 254; Co. Litt. 27 a, 220; 1 Prest. on Estates, 449; 2 Bl.
Com. 109; Cruise, tit 1, Sec. 82; 2 Bouv. Inst; n., 1695.