1George Gibbs to Thomas Jefferson, 11 March 1817 (Jefferson Papers)
fossils; and New-York Historical Society [index entry]
2Enclosure: Statement of the Mineralogical Committee of the New-York Historical Society, 11 March 1817 (Jefferson Papers)
fossils; and New-York Historical Society [index entry]
3Enclosure: Statement of the Committee on Zoology of the New-York Historical Society, 11 March 1817 (Jefferson Papers)
fossils; and New-York Historical Society [index entry]