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The Collection was the creation of the financier Carl H. Pforzheimer (1879-1957), who took a special interest in the lives and works of the poet Percy Bysshe Shelley and his contemporaries, including his second wife, Mary Wollstonecraft Shelley, her parents, William Godwin and Mary Wollstonecraft, and such friends and fellow writers as Lord Byron, Claire Clairmont, Teresa Guiccioli, Thomas Jefferson Hogg, Leigh Hunt, Thomas Love Peacock, Horace Smith, and Edward John Trelawny.