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Carl H. Pforzheimer Collection of Shelley and His Circle, The New York Public Library. "A Riddle on the Letter H" The New York Public Library Digital Collections. 1820 - 1831. https://digitalcollections.nypl.org/items/c1d43830-44c2-0135-67df-799aec126ddb
Carl H. Pforzheimer Collection of Shelley and His Circle, The New York Public Library. "A Riddle on the Letter H" New York Public Library Digital Collections. Accessed October 4, 2024. https://digitalcollections.nypl.org/items/c1d43830-44c2-0135-67df-799aec126ddb
Carl H. Pforzheimer Collection of Shelley and His Circle, The New York Public Library. (1820 - 1831). A Riddle on the Letter H Retrieved from https://digitalcollections.nypl.org/items/c1d43830-44c2-0135-67df-799aec126ddb
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