John Sandys, Northampton, to Mr. John Robinson, Stationer Dock-head, London, 29 September 1769.
John Sandys, [Tottlebank], to the Managers of the Particular Baptist Fund, London, undated [c. 1769].
John Sandys, Northampton, to the Managers of the Particular Baptist Fund, London, c. autumn 1769.
John Sandys, Northampton, to the Managers of the Particular Baptist Fund, London, 23 March 1770.