Green’s Dictionary of Slang

Akerman’s hotel n.

Newgate.

1796		(ref. to 1787) Grose Classical Dict. of the Vulgar Tongue (3rd edn) n.p.: Akerman’s Hotel. Newgate. In 1787 a person of that name was the gaoler, or keeper.
1846		Swell’s Night Guide 109/1: Akerman’s Hotel, Newgate in 1787, a gaoler of that name.