Good question, as Mark shows the 1841 census has Esther aged 20 which indicates :-

1. It is a mistake to IGI
2. There was a death and birth unrecorded.
3. She is a visitor.

Robert Leece and Isabella Kelly had a number of daughters who worked away and they had an Esther 1819. I believe this Esther married Josiah Kay 1845 and had children Thomas and Robert. By 1851 Josiah, Esther and Thomas may be the ones showing in the burial index leaving Robert with his grandmother Isabella.

That leaves Esther of John and Anne to marry Thomas Moore.

The 1841 census at Ballamona Braddan has the list that Mark shows with an indication that they are all of independent means which makes me think the age is an error.

That then raises the question where was Esther from the Fort Street Leeces.

Len Faragher