L, PHi, Benjamin Franklin Papers, vol. 2, no. 43. The recipient is not given but it was undoubtedly David Hartley, who both administered the money whose expenditure Wren discussed in the portion of the letter not included and who, on 29 May, wrote Benjamin Franklin that he was enclosing some long-delayed letters and that Wren had written him about prisoners’ grievances concerning their exchanges. Franklin Papers 26: 539. For more on Wren, see NDAR 11: 885–87, 909.