1851 Rushen census
Port St Mary
Richard Moore 35 widower labourer b Rushen
Margaret dau 6 Sunday scholar b Rushen
Jane dau 4 Sunday scholar b Rushen

Neither girl is in the IGI

There are 2 Richard Moores b Rushen in this period
ch 27 MAR 1818 Thomas Moore & Catherine Quill
ch 20 NOV 1814 Thomas Moore & Sarah Shimmin

There are 2 marriages in Rushen of Richard Moore, both to Janes
In the 1861 Index Jane 15 and Margaret 17 are with their father Richard now listed as age 40 and Jane 33
This seems to be Jane Witted
Richard ch 20 SEP 1857 Rushen
Age 3 in 1861 census

At least this father is Richard a labourer