Includes three letters to his son, Francois André (1783-1801); an act of New Jersey authorizing Michaux to purchase land in the state to establish a botanical garden (1786); five letters to John Wakefield Francis concerning publishing projects and acquisitions of books and journals (1817); a letter from James MacPherson Le Moine to Henry Phillips, Jr. (1890); and, an undated letter from Alexander von Humboldt to Michaux.