I've got the following from FamilySearch.org:
In the 1901 census the household consisted of head Edgar Jones (age 23), wife Kate Jones (age 22), daughter Edith Jones (age 1), niece Mary Paine (age 1) and brother Charles Jones (age 13)
At the 1911 census Edgar Jones's household is recorded as himself (age 33), wife Kate (age 33), daughters Edith (age 12), Dora (age 9), Edna (age 4), son Edgar (age 2), and nieces Mary Jones (age 11), Violet Jones (age 4). The recording of Mary's surname as 'Jones' explains why I couldn't find her before.