1Thomas Jefferson to Charles Willson Peale, 10 March 1809 (Jefferson Papers)
mastodon (mammoth, Ohio); at Philadelphia Museum [index entry]
2Thomas Jefferson to Charles Willson Peale, 5 May 1809 (Jefferson Papers)
mastodon (mammoth, Ohio); at Philadelphia Museum [index entry]
3Montlezun’s Account of a Visit to Monticello, 20 September 1816 (Jefferson Papers)
mastodon (mammoth, Ohio); at Philadelphia Museum [index entry]