Going bvack to this tree, trying to fill in more blanks, It looks like William Burgess Sheldon had two siblings Lilian Alice born 1905 Southampton and Ivy A born 1904 in Egypt.
I have found the girls living with their grandmother Julia Alice E Sheldon, nee Griffin on the 1911 census.
I am trying to find William born 1877 and Jeanie born 1881 on the 1911 census to see if that tells me how many children they had etc but as not yet I have had no luck. Presume they might have been back in Egypt.
Also if anyone has Ancestry, are the hampshire marriage certs on line and if so could they look at the marriage for william C E sheldon and Jeanie Buchanan and tell me the name of her father please.