Source: Bruce Remembers
Blog article about this soldier.
Military Medal for Bravery in the Field during his service as a stretcher bearer. Bruce Remembers indicate this was for actions on August 8, 1918. Ref. The London Gazette. 7 February 1919.Supplement: 31173. Page: 2130.
His brother, Pte. Robert William Dobson, served with the 18th Battalion.
This soldier lost his leg during action at Arras on August 26, 1918 and this passage relates what happened:
War Diary of the 18th Battalion CEF 