Talbott, Page, ed., Benjamin Franklin: In Search of a Better World (New Haven and London: Yale University, 2005) (companion book to exhibition of same title) Fig. 5.9
Owned by Franklin in London, and mentioned in his correspondence. Writing from Paris to his London landlady, Margaret Stevenson, he asks that she send him things left at her home, including "the Piece of Elephant's Tooth." She responds that she "never saw it" after Franklin's nephew Jonathan Williams packed up his books; and she believes it was sent with the books and other things "to Philadilapy" (Philadelphia). The tooth was found during excavations on the site of Franklin's mansion, which is now part of Independence National Historical Park.