A brothel. The swell was spiced in a snoozing ken of his screens; the gentleman was robbed of his bank notes in a brothel.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
To Snooze * SnowNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes