Hello SWH1,
Not sure if this has any relevance to your search. I Googled the address, 78 Grange Loan, Edinburgh and among the list that popped up was this:
Becourt Military Cemetery - The Scottish War Graves Project.
Along with a photograph of the immaculately kept Military Cemetery at Becourt, Somme, France, this site has a photograph of the Headstone for Second Lieutenant J. A. Gordon Cameron.
Details: Cameron, J. A. Gordon.
Rank: Second Lieutenant.
Date of Death: 18/11/1916.
Age: 19.
Regiment: Cameron Highlanders, 3rd Bn.
Cemetery: Becourt Military Cemetery, Becordel-Becourt. Grave Ref: Z. 12.
Additional Information: Son of Margaret Cameron, 78 Grange Loan, Edinburgh, and the late Alexander Cameron.
With son J.A. having the middle name Gordon, could Margaret & Alexander Cameron be relatives that Isobella stayed with while in Edinburgh?
http://scottishwargraves.phpbbweb.com/scottishwargraves-post-23730.html Regards, Dod.