I wonder if Ethel had been married before? Or was still married to someone else? Might be worth getting the other children's birth certificates to see if the mother's (and father's) name is the same? Doris and Reginald are with her in 1901 and 1911. She said she had two children, none died , in 1911. Probably she had misunderstood the question .......... She also said she had been married for 20 years.
Doris Cordelia Cumby Apr/Jun 1892 Richmond S. 2a 401
Reginald Cumby Jan/Mar 1897 Fulham 1a 195
I notice all the children at the West London Parish School in Staines have no place of birth given, so I don't necessarily think it means no contact with his mother.
I looked at the 1871 census for Ethel M (anything) born Reading c. 1865, and there aren't very many. It might be worth following them all up? There is an Ethel M Miller aged 3, daughter of an army captain on half pay. She is at school in East Grinstead in 1881, and is an Ethel Maud. I don't see her on a quick look in 1891.
They're not at 1 Chivalry road in 1891 - it's a Potts family.
Anne
Sorry Orpheus - we had the same thought at the same time