The two photographs on Page 34 were taken by an RE8 of 6 Squadron, part of the squadron's aerial reconnaissance operations over the Western Front during WW1.

 

The photographs were taken to show the effect of the pre-bombardment allied barrage on a German battery at Zonnebeke (present day location 50°49'32.1"N 2°58'28.0"E - in the middle of a field 100 metres south-west of the Zillebeke Hoeve Martain bus interchange on Oude Zonnebekestraat). The photographs were taken immediately prior to the Battle of Messines, over map coordinates 28. O. 12. b and 28. O. 12. a. The upper photograph was taken on the 1st May 1917 and the date of the lower photograph was 7th May 1917.