A number of guineas, from twenty to fifty or more, wrapped up in paper, for the more ready circulation at gaming-tables: sometimes they are inclosed in ivory boxes, made to hold exactly 20, 50, or 100 guineas.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Rough Music * Round DealingNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes