Hello,
I am here having seen the post on the Irish board.
This is perhaps Malachy in 1871 3756 / 61 / 23
5 House, 4 Court Rachel Street
Sarah Carless widow 60 yrs b Ireland
Malachi Carless son 19 yrs Plasterer's labourer b Liverpool
plus 2 Kenny boarders
The name could be Corless and the address fits with the marriage.
regards
heywood