It would appear that Walter Sidney's father and mother, Henry William and Harriet were living at 119 Crystal Palace Road in 1911 with their other children in four rooms, along with Walter Sidney and his first wife Emily Mildred and daughter Emily Annie in four rooms. Before that, in 1901 the family were living in Sumner Terrace, Peckham, then back n in 1871 it appears that Walter Sidney's grandfather Martin Fentum, an ivory Turner employing 20 men and 6 women was living at 'Norville' near Alleyne Park. Of course, this is all conjecture, you have to prove it with some sources other than census like certificates, etc.. but great fun!