Green’s Dictionary of Slang

1. a prisoner.

1660		‘Peter Aretine’ Strange and True Newes 2: [He] sent her to study mischief in Newgate [...] in which time, by advice of her fellow Collegiates, [...] she grew up a most exquisite Whore.
c.1698		B.E. Dict. Canting Crew n.p.: Colligiates c. those [i.e. of Newgate] Prisoners.
1725		New Canting Dict.
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict.
1742–4		R. North Lives of the Norths (1826) I 38: His beginnings were debauched, and his study and first practice in the gaol. [...] There [...] he busied himself with the cases of his fellow collegiates.
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.

2. a shopkeeper at the Royal Exchange or Newgate prisons.

c.1698		B.E. Dict. Canting Crew n.p.: Collegiate [...] those [i.e. of the Royal Exchange] [...] Shop-keepers.
1725		New Canting Dict.
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict.
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.