Green’s Dictionary of Slang

slick-a-dee n.

a pocket-book.

1839		H. Brandon Dict. of the Flash or Cant Lang. 165/1: Slick a Dee – pocket-book.
1859, 1860		Hotten Dict. of Modern Sl. etc.
1864, 1867, 1870		Hotten Sl. Dict.
1889		Barrère & Leland Dict. of Sl., Jargon and Cant 255/2: Slick-a-die (thieves), a pocket-book.
1890–1904		Farmer & Henley Sl. and Its Analogues.