2. For the correspondence, see
SF 101250. As to the Apthorps, see Wendell D. Garrett,
Apthorp House 1760–1960 4–8 (Cambridge, Mass., 1960); John Wentworth,
The Wentworth Genealogy, 1:512–520 (Boston, 1878). See also a mortgage assigned by James Apthorp to Barlow Trecothick for £151, on 15 Dec. 1767, in
SF 145409.