Fidlam Ben (Grose 1811 Dictionary)
General thieves; called also St. Peter’s sons,
having every finger a fish-hook. Cant.
Definition taken from
The 1811 Dictionary of the Vulgar Tongue,
originally by Francis Grose.
Fidgets * Fiddlers Money
1736 Dictionary of canting and thieving slang
John S. Farmer's collection
canting songs and slang rhymes