Margaret appears to be with her widowed mother in Bedwellty in Tredegar.
Ellen Sullivan, 1855, Ireland, housekeeper
Margaret Sullivan, 1876, Tredegar, Brickmaker.
Dan Driscol, 1859, Ireland, Lodger
Dan Ryan, 1844, Ireland, Lodger
Michael McCarthy is more problematical. Possibly found him in 1881 at RG11; Piece: 5263; Folio: 128; Page: 22