Other than the above information, the only other fact known about Sergeant Hall is that his widow is recorded by the Commonwealth War Graves Commission as being Eliza A Hall and that, in the 1920s, she was living at 135 Hall Street, Stockport.
Family history websites indicate that the only man with this name was born in Marylebone, London in March 1867 and it must be presumed that it is the same person. At the time of the 1901 Census, a man of this name (and of the right age) was living at 48 Hazelbourne Road, Streatham. He was married to a woman called Lizzie, who had been born in Stockport. Sydney worked as an ironmonger's traveller and must have sold good abroad as two of his children had been born in South America. The Census records their son, also called Sydney, had been born in Rosano, Argentina in 1895. Their daughters were Mary (born in London in 1896) and Lucy (born Buenos Aires in 1899).
By the time war was declared in 1914, Sydney was probably too old for front line active service but was assigned to the Army Service Corps. His service number prefix, "S4", indicates two pieces of information. The "S" indicates he was engaged in supply work, effectively working as labourer moving stores. The "4" confirms his ASC unit was assigned to the 4th New Army, formed in early 1916 and Sydney would have seen service in France and Belgium after that time.
The Commonwealth War Graves Commission does not record his actual unit and this suggests that he had probably been discharged from the army, due to illness or injury, some considerable time before he died. His burial at home also supports that. As he is commemorated by the Commission, his death must have been directly related to his war service.