Good find by Aghadowey

Adam's army number is quite low(7795) so I would suspect he was in the Army before 1914(or enlisted early)
You might want to post on the Armed Forces board on Rootschat to see if you can find out anything
else about Adam junior. There will be a medal card at the very least.
ev
Added -
National Records of Scotland has an informal will for Adam(from pay book)
Will of 7795 Corporal Adam Humphrey, M.M., 1st Bn., King's Own Scottish Borderers, Cause of death: Killed in action, France or Belgium, Theatre: France and Flanders, 17 Aug 1917