Betty WALKER was most likely baptized on 14 Apr 1771, in Turton (midway from Darwen to Bolton) by Thomas and Betty WALKER.
Another Betty was baptized in 1768 by Joseph and "Ammery" [Anne Marie?] also in Turton.
If born in 1771 then she would have been 22 when William was born and in 1811 would have been 40.
