Series II. Financial Papers contains financial papers from the running of Nathaniel B. Mansfield's merchant business. Researchers should also consult the individual ships' papers for additional financial and account documentation. Subseries A. Bills, Invoices, and Receipts contains bills, invoices, and receipts issued by or to Mansfield and his various business partners, in addition to promissory notes. The items in this subseries have been filed according to the date they were paid if that date has been written on the item, otherwise they are arranged according to the date they were issued. Some items have been grouped together by account name or location; these items have been left together as it was unclear who originally grouped them together. Subseries B. Accounts Current contains account invoices and receipts, and accounts current from or to Mansfield and his various business partners. Subseries C. Returned Checks contains checks that were returned from financial institutions. Some of the returned checks were written by the firm of Rideout and Roberts. There are also some returned checks that were written by C. B. Stevens; it is unclear who that was. Of interest is that the signature has been torn out from a significant number of items. Subseries D. Account Books contains account books kept by Nathaniel B. Mansfield (1796-1863) and his son Nathaniel B. Mansfield (1834-1889). This subseries includes day books, ledgers, journals, account books, cargo books, sales books, cash books, and account books for specific ships.