Green’s Dictionary of Slang

(UK Und.) two.

1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1809		G. Andrewes Dict. Sl. and Cant.
1811		Lex. Balatronicum.
1835		G. Kent Modern Flash Dict.
1846		Swell’s Night Guide 135/1: Twitto, two.
1848		Flash Dict. in Sinks of London Laid Open.
1859		Matsell Vocabulum.