D, NjP, Andre de Coppet Collection (C0063), Papers of John Cushing and Samuel White, 1775–1787. Addressed at top: “Messrs Cushing & White." Docketed: "Sam: & Rt. Purviance's/Letter 20 June 1778/reced. 8th July.” A copy of their letter to Cushing and White, dated 23 Apr., is enclosed.