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Henry W. and Albert A. Berg Collection of English and American Literature, The New York Public Library. "Sketch of two men's heads with holograph note on verso" The New York Public Library Digital Collections. 1860. https://digitalcollections.nypl.org/items/5f9bcb30-3158-0132-4097-58d385a7b928
Henry W. and Albert A. Berg Collection of English and American Literature, The New York Public Library. "Sketch of two men's heads with holograph note on verso" New York Public Library Digital Collections. Accessed February 1, 2025. https://digitalcollections.nypl.org/items/5f9bcb30-3158-0132-4097-58d385a7b928
Henry W. and Albert A. Berg Collection of English and American Literature, The New York Public Library. (1860). Sketch of two men's heads with holograph note on verso Retrieved from https://digitalcollections.nypl.org/items/5f9bcb30-3158-0132-4097-58d385a7b928
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