Green’s Dictionary of Slang

computed adj.

[pun on Compter]

imprisoned in the Giltspur Street Compter Prison , near Smithfield (Meat) Market, London.

[UK]High Life in London 20 Jan. 7/1: Witness obtained the assistance of some other watchmen, and after a desperate resistance, lodged the prisoner in the Compter. ‘Elizabeth,’ he said, ‘was a computed prostitute’.