A more likely contender is Robert s/o James + Margt watterson bapt 1771 - he was my 1first choice as contender but I assumed from your initial post that you had good reasons to look at the James + Moore couple
The James h/o Margt Watterson prob died 1775 - will d 21 feb ;cronk-y-berry;7 ch - james, john, wm, robt, ellinr, jane + margt jt admrs - last 5 ua James + john sworn;pledges Thos Watterson tromode + john kewley ballanard;wife alive
Margt prob d 1825 - will dated 27 Oct 1820;widow James oates;formerly Knockaberry;;'old + infirm';ch James, John, Robt,Elinor, Margt (w/o Tho Quirk) exex