The 1911 census, taken on the night of Sunday 2 April 1911, did show some changes for the household of William Huxtable Ball of Penarth. William is shown as 74 years of age, still working as a milkman, and a widower. His address remained 18 Railway Terrace. He was living with son-in-law, William Down, age 44, workman, his daughter, Charlotte, age 42, and granddaughter, Charlotte Down, age 9, who was attending school. Charlotte's birthplace is listed as Penarth, so presumably, she was born and raised in her grandfather's home. Also with the family is Mabel C (Charlotte) Ball, a dressmaker, age 29, who had been born in Gower, Glamorgan. She was the daughter of William's eldest son, William James Ball. As to the reason why she appears in her grandfather's home in 1911, I will investigate further and post once information is available.