Looking for info on Michael Woods

My great great grandfather Michael Woods left Ireland to llive in Wales with his wife Margaret Sculley. They both appear on the 1871 Wales census as living in Sirhowy Tredegar Monmouthshire with their two sons John and Cornelius. Michael was listed as age 26 and Margaret as 24 both born in Cork. This is the only information I have on them and am wondering if anyone out there has information on both their families in Ireland both past and present.