The two photographs on Page 15 were taken by an RE8 of 6 Squadron, part of the squadron's aerial reconnaissance operations over the Western Front during WW1.

 

These two photographs were were taken over Hollebeke, as defined by sections of the areas defined by the mapping coordinates 28. O. 6 and 28. O. 11. The first photograph was taken on the 24th March 1917 and the second on the 11th June 1917, 4 days after 19 mines were detonated beneath the German lines along the Messines ridge at the start of the Battle of Messines.