There's a marriage for Robert Bell to Elizabeth Morris
Jun 1880 Prestwich 8d 537
Could be them? Finding them on 1881 census might be helpful. Then we could try tracing Robert back to childhood.
(Note: They are not the Robert and Elizabeth in Blackburn as I have found them on familysearch and she has a different maiden name)
The printer Robert mentioned earlier in 1881 born Carlisle is unmarried in 1881 which isn't helpful

I wonder if they emigrated to USA too?
Milly