[CHEATING]. Group of 12 vintage decks of marked and gaffed playing cards. Circa early to mid-20th century. A dozen packs of cards by USPC, New York Consolidated Card Co., E & S, and Russell Playing Card Co. Brands include Bicycle (Oak Leaf Back), Aviator, Steamboat, Bee, Battle Axe, Mocker, and a NYCC monogrammed double deck. Mocker deck with enclosed instruction booklet for magicians. With a typed inventory explaining the various card marking and cheating techniques on the decks. [Also with]: a USPC Steamboat deck marked in pencil on the ace of spades: “JT McLaughlin/Mansion Hotel/Greenfield Mass” with a small drawing of a pint of beer: “Apr 9-33/Sold Out/25 cents per pt.” Altogether 13 decks, each 52 plus joker or two jokers, 10 with original boxes. [With]: a binder of 27 slips with instructions for marked cards and dice cheating.