Just after Robert & Hannah married, there is:
1861 census
Gartnaval Pit, Govan, Glasgow, Lanarkshire.
Robert Rankins, 26, Contractor, Coal Pit, born Old Monkland
Hannah, 25, Wife, b Eastwood, Renfrewshire
Elizabeth F, 1, dau, b Govan, Glasgow
He was born at Coatbridge, Old Monkland, Lanarkshire, east of Glasgow.. I saw somewhere that his father was James, mother Jane. As I think you know, he was buried at McClean Cemetery, Chatsworth Island. His birth seems to be 1835. ...On this census, the surname is given as Rankins when it should be Rankin. I believe I saw two earlier census returns for Robert, 1841 and 1851. You probably have them already.