Green’s Dictionary of Slang

Old Nask n.

also Old Nass

Bridewell prison, Tothill Fields, London.

[UK]C. Hitchin Regulator 19: Old Nass, alias London Bridewell.
[Scot]Life and Trial of James Mackcoull 11: His younger brother Ben, having been convicted of a petty offence, was sentenced to six month’s confinement in the Old Nask.