The Amos Eaton papers (MC 11) consist of correspondence, Eaton’s herbarium (1830), his geological journal (1830-1836), journal fragments, an 1821 deed to the Old Bank Place (the original home of the Rensselaer School), two instruments used by him (steel mineralogist's forceps and a bone letter opener/paper folder), three geological survey drawings, and an undated sketch and comments on women's fashions. Correspondents include William Aiken, Lewis C. Beck, William Marcy, Oliver Steele, John Torrey, Silas Wright, and founder of the Troy Female Seminary, Emma Willard. The collection also contains correspondence among Eaton family members, including Almira Eaton, Amos B. Eaton, Daniel Cady Eaton, Hezekiah Hulbert Eaton, Timothy D. Eaton, Sarah C. Eaton, William B. Eaton, Typhena Cady, and Nathan Halsey; many of the letters are also available as typed transcriptions.