Personal diary of active service on the Western Front during World War One, notably Gibson's return to 15 (Service) Bn, (1 Glasgow) Highland Light Infantry in Feb 1917; an interview with Col [Valentine] Vivian, Chief S[taff] O[fficer] for Intelligence, leading to a post at 4 Army Headquarters, Querrieu, France, 22 Feb, 1917; description of his work as a junior intelligence officer, including interrogation of prisoners and gathering of information concerning the German withdrawal from the Serre salient; a note on the death of Lt Col William MacCallum Macfarlane, who served with Gibson in the original A Company of 15 (Service) Bn, (1 Glasgow) Highland Light Infantry; Gibson's evacuation to No 8 General Hospital after contracting measles, 24 Mar 1917, and his eventual return to the battalion stationed at Nesle, 28 Apr 1917; transport of the battalion to Bailleul in Flanders in preparation for the Battle of Messines Ridge, 1-7 Jun 1917; transport of the battalion north, to the trenches near Nieuport; Gibson's interview in London with the India Office, and his acceptance into the Indian army, 9-11 Jul 1917. 1 vol.