I already had more thoughts...
- on that 1777 marriage record there is a witness Richard Letty. The other witness seems to be a 'stock witness'. I wonder whether Richard Letty was friend, or family?
- her children of John Axe were born between 1779 and 1792. Lest's say she was 40 in 1792, that would make her birth year 1752. She could have been older (born earlier), but somehow I doubt it.