Hello.

The 1871 census for the I.O.M has only one
Peter Murphy born 1831 county Down, with
wife Susan born 1821 also county Down and
two children:
Celia born 1853 I.O.M
Mary born 1859 I.O.M

lodgers include:
Kniole Connor 1811 Longford, Ireland Lodger
Mary Mc Minan 1821 Derry, Ireland Lodger
Elizth Morgan 1804 Down, Ireland Lodger

Good luck.

Mike.