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Philip C. Duschnes (c. 1897 – July 4, 1970) was an American book dealer specializing in rare books. Based in New York City at 66 East 56th Street, then 58th Street and Seventh Avenue, and later 699 Madison Avenue, Philip C. Duschnes Rare Books & First Editions specialized in works by T. E. Lawrence and Mark Twain, as well as fine printing, illuminated manuscripts, and work by the typographer Bruce Rogers. He was also a publisher of The Colophon, A Book Collectors' Quarterly.