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OC 20 p. :  ill.  "Price 5 cents."  Color cover with color illustrations. "The All-Mystery Number." Cover stories: The Million Dollar Suitcase / by Horace Hazeltine, The Riddle of the Flying Hands / by Hazel Goodwin Keeler, The Albert Gate Enigma / by Louis Tracy, The Carnival Puzzle / by Lewis H. Moulton and The Meter Mystery / by Isobel M. Reynolds. Donated by Demian Katz.