1714. Memoirs of John Hall (4th ed.), p. 12, s.v.
1785. Grose, Vulg. Tongue, s.v.
1823. Bee, Dict. of the Turf, s.v. Jacob ... to prig the jacob from
the dunckin-drag.
1859. Matsell, Vocabulum, s.v.
3. (old).—A soft fellow; a spooney; a fool.—Grose (1785); De Vaux
(1819).