Hi there,
I have the info on Arthur Wells and Sarah Kennedy (thanks). I believe that their children Ann and Michael were living with Michael Wells (from Ireland) in 1841. N B There was at least one other child living with Michael other than his own children (who was his Grandson) listed on the census in 1841. There is also another Irish Walls/Wells family in dumfries in 1841- Patrick and Elizabeth- where the Arthur name crops up again.
Re the Ireland connection, I wondered if there had been a name alteration when they came over the sea. The name Walsh/Welsh is very, very popular in Ireland.
I will also keep looking and will post here if I get any more info.
Best wishes