1. 8. Wetherill and Brother, account books, 1809, 1830–60.
2. 6. Trotter, Nathan, and Company, account books (Baker Library, Harvard University), 1821–60.
3. 4. Krauss J. , farm account books, 1810–15.
4. 7. Westown School, account books, 1833.
5. 3. Lippincott and Company, account books, 1809–19, 1880–85.