[69] Nathaniel Chapman headed the Accokeek Ironworks, referred to by Mercer in Ledger G as "Chapman's Works at Head of Bay." Although Mercer had opposed the act, which gave privileges to the ironworks, he was a lifelong friend of Chapman, who testified in his behalf in 1734 and served with him on the Ohio Company Committee in the 1750's and 1760's. Chapman was executor for the estates of Lawrence and Augustine Washington.