The Bartholomew mss., 1838-1886, consists of the papers of American businessman, pioneer, and judicial officer Jacob Bartholomew, 1818-1863, and his wife, Emily Ebersole Bartholomew, 1825-1913.
The Eigenmann mss., 1851-1971, consists of the papers of Carl H. Eigenmann, 1863-1927, ichthyologist, and his wife, Rosa Smith Eigenmann, 1858-1947, ichthyologist.
The Gwatkin mss., 1773-1780, consists of letters from educators Sarah More, 1743-1817, and Martha More, 1750-1819, to their patron, heiress Ann Lovell Gwatkin, 1729-1809.
The Stevens mss., 1749-1916, consist of papers of William Arnold Stevens, 1839-1910, his wife, Mrs. Caroline (Clarke) Stevens, 1834-1916, and members of their respective families.