Looking details on James Rae born Armagh no census records or will details ?

Armagh Men Rae J 2ND Bn Black Watch (RHR)
Rank: Private
Service No:S/7729
Date of Death: 09/05/1915
Age: 22
Regiment/Service: Black Watch (Royal Highlanders) 2nd Bn.
Additional Information:
Son of Thomas and Elizabeth Rae.

UK, Soldiers Died in the Great War, 1914-1919
Name: James Rae
Birth Place: Armagh, Co. Armagh
Death Date: 9 May 1915
Death Location: France & Flanders
Enlistment Location: Glasgow
Rank: Private
Regiment: Black Watch (Royal Highlanders)
Battalion: 2nd Battalion
Number: S/7729
Type of Casualty: Killed in action

British Army WWI Medal Rolls Index Cards, 1914-1920
Name: James Rae
Regiment or Corps: Royal Highlanders
Regimental Number: S/7729

Date of entry 18 3 1915 France K in A 9 5 1915
No service/pension Card No mention in Armagh 1901/11