Great find!

For other logophiles in the crowd, I suggest the 1811 edition of the Dictionary of the Vulgar Tongue at Project Gutenburg.  It contains such gems as:

DOG'S PORTION. A lick and a smell. He comes in for only a dog's portion.

SHOOT THE CAT. To vomit from drunkenness.

DISGUISED. Drunk.

BUTCHER'S DOG. To be like a butcher's dog, i.e. lie by the beef without touching it; a simile often applicable to married men.

I found it a fascinating read.