The two photographs on Page 23 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 were taken of the white chateau at Hollebeke (as distinct from the White Chateau at Palinbeek), defined by mapping coordinates 28. O. 12. B. The first photograph was taken on the 6th April 1917 and the second on the 12th June 1917, 5 days after 19 mines were detonated beneath the German lines along the Messines ridge at the start of the Battle of Messines. Note the incredible destruction caused by the allied bombardment prior to the start of the Battle of Messines.