Sidney Wooler Marshall was the son of Moor Marshall and Caroline Amelia Willis. His father was working as a railway guard in Darlington in the 1881 census. In the 1901 census he had moved to Heighington Street, Aycliffe and was a railway agent. By the 1911 census Moor had become Railway Station Master, still living in Heighington Street.

Sidney Wooler Marshall was born 9 January, 1897 in Darlington. In the 1911 census Sidney is a boarder at 6, Cecil Street, Carlisle and was still at school.

There are 2 medal cards with Sidney W Marshall for 2 different men: one is for Sidney W Marshall of the Yorkshire Regiment, Service Corps 29114/372410, and he received the Victory and British War medals, and the other is for Sidney W Marshall of the RAMC Pte 34313,who received the Victory and British War Medal, 1915 Star and served in France 24.2.15.