Do you have them on the 1911 census ? We are not allowed to do lookups for 1911 for copyright reasons but if you look for Herbert Thomas Davies and Edith Defevre Davies you should find them listed with their children. There is an entry in the Probate Index for Edith De Ferre Davies who died 18 Jan 1935, estate to Mabel Caroline Phillips , wife of Frederick Herbert Phillips. Mabel Caroline Davies was born in 1908 ,rather than 1897 I think :
Mabel Caroline Davies J-S 1908 West Ham 4a 101.
The 1901 census is badly transcribed :
Herbert Hermas Darris b 1873 Fishguard
Edith De Forre Darris 24
Hugh Darris son 4
living in West Ham