Green’s Dictionary of Slang

smuggling-ken n.

a brothel.

1725		New Canting Dict. n.p.: He has pick’d up the Blowse, and they are pik’d into that Smuggling-Ken a Clicketting.
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. n.p.: smuggling-ken A Bawdy-house.
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.