Thanks to all of you who have suggested ideas for following up Margaret Gordon and her husband.
However, so far nothing seems to 'fit'.

Margaret (Davies) is living with her parents at the 1901 Census.
In 1911 Margaret's husband is not with her, but their marriage has lasted 11 years. I wonder if Mr Gordon is at sea? Or they aren't actually married? (I can't find the son's birth anywhere).
Any other suggestions please?

Melbell