Abraham Dyson (see his brother Dyson,George) was buried at St Leonards Shoreditch on 8.4.1818 age 43 of Hoxton New Town, suggesting he was born in 1775, thus before his parents' marriage, which accords with the Treasury's confiscation of his effects (value £850) as a "bachelor and a bastard" (Nat Arch PROB31/1145/344). He appeared in Godwin's diary on 13.7.1788, 5.9.1791, 28.2.1792(not coded in GD website0, 1.3.1792, 20.3.1792 (not coded in GD website), 22.3.1792, 9.5.1792, 30.8.1792 (not coded in GD website), 1.10.1792, 7.12.1792, and 6.8.1793. George Dyson in his letters home from South America lamented his brother's indolence but other letters show that in 1810 he worked for Sir Joseph Banks helping distribute Merino sheep and in 1816 he went to Lisbon on a business venture (Nat Arch TS11/463).