9NS. MESSINES (Ypres Salient) Part of Sheet 28 with trenches corrected to 4 September, 1916. Unlike some other of our trench maps, this only sketches in the British front line but the enemy’s trenches are given in great detail. Note the mine craters and the heavy protection given to Wytschaete. An essential for any collector of material on the war in the Ypres area. Scale 1:10,000.