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Box 18 Louis H. Conn's Writings
Box 19 Louis H. Conn's World War I memorabilia
Box 20 Marguerite Cohn's writings
Box 21 Marguerite Cohn's collections: cigar bands, monograms, greetings cards
Box 22 Marguerite Cohn's family photos and memorabilia
Box 23 Marguerite Cohn's memorabilia: autograph album, baby book, etc.
Box 24 House of Books Catalogs
Box 25 Publications about House of Books
Box 26 Rothkopf publications
Box 27 Misc. published material (includes the firm's official seal)