[Autographs] Friends of the Yogi Magic Mart Autograph Display. Baltimore, 1940s ? 60s. Large paper sign lettered with the text ?Friends of the Yogi Magic Mart? at its center, and covered with the signatures of hundreds of magicians, both well-known and obscure, who visited the storied magic shop owned and operated by Phil Thomas. Among the autographs on the sheet are those of Blackstone Sr. (with self-portrait caricature), Percy Abbott, Russel Swann, Al-Pi-Gi-Ni, Dagmar, Paul Duke, Al Minder, Orville Meyer, Roy Benson, John Mulholland, S. Leo Horowitz, Kay Thomas (Phil Thomas?s wife), Burling Hull, Hardeen Jr., and hundreds more. Framed to 25 ? x 24 ??. One horizontal crack visible; not examined out of frame.