Going thru the brothers...........
sisters don't appear to have gone to Canada either.
Brother Douglas Forbes Robertson died 27 September 1916
Hugh (1923), Sarah (1914) Douglas (1916) and Ada (1898) all mentioned on the find a grave memorial at :-
Jarrow Cemetery
Jarrow, Metropolitan Borough of South Tyneside, Tyne and Wear
https://www.findagrave.com/memorial/202924707/douglas-forbes-robertsonAda Robertson - 1889 - 1898 (aged 9 years)
Death Registration Place South Shields, Durham
Volume 10a Page 513
Brother George Harold Robertson died as the result of a terrible accident
1902
Evening Chronicle
Newcastle upon Tyne, Tyne and Wear
Fri, 21 Nov 1902
Page 6
https://www.newspapers.com/article/evening-chronicle/148032867/The Daily Telegraph
London, Greater London
Sat, 22 Nov 1902
Page 7
https://www.newspapers.com/article/the-daily-telegraph/148032880/Lieutenant W Robertson and a mention of Douglas Forbes Robertson
The Journal
Newcastle upon Tyne, Tyne and Wear
Wed, 18 Oct 1916
Page 6
https://www.newspapers.com/article/the-journal/148032906/The North Star
Darlington, Durham
Wed, 18 Oct 1916
Page 5
https://www.newspapers.com/article/the-north-star/148032933/Douglas Forbes Robertson - 28 September 1916
Rank Temp 2 Lieutenant - Regiment Northumberland Fusiliers
Battalion 15th Battalion
Type of Casualty Died of wounds
FIND A GRAVESecond Lieutenant Douglas Forbes Robertson.
15th Battalion Northumberland Fusiliers (attended 8th Battalion)
Warloy-Baillon Communal Cemetery Extension
Warloy-Baillon, Departement de la Somme, Picardie, France.
https://www.findagrave.com/memorial/15991696/douglas-forbes-robertsonThe Journal
Newcastle upon Tyne, Tyne and Wear
Tue, 3 Oct 1916
Page 6
https://www.newspapers.com/article/the-journal/148033062/Jarrow Cemetery
https://www.findagrave.com/memorial/202924707/douglas-forbes-robertson#view-photo=192333312https://www.findagrave.com/memorial/15991696/douglas-forbes-robertson#view-photo=199145283Sandra