Abstract The Iron Manufacturing Companies Records contains records related to the business interests of David Pingree (1795-1863) and Asa Pingree (1807-1869) in four iron manufacturing companies located in New England: The Maine Iron Company; The Ipswich Manufacturing Company; New Hampshire Iron Company; and Briggs Iron Company. The collection is chiefly comprised of correspondence, accounts, and other records received by David Pingree from the corporations. One folder contains correspondence from...