The main-guard of Schilderbrug with its advanced posts, (one outlook post on the road and two sentry posts on the water with the intermediate ones) gave the troops a sufficient security to allow the men, in spite of the rafale fires which from time to time poured upon the line, to say: “It is fine in Pervyse”. The line was organized since the early days of its occupation, then was gradually improved to become during the last years of war a model of stabilized trench warfare area. Even the station itself, where an artillery observation-post had been constructed, was wedged in a powerful stronghold whose solid concrete shelters for machine-guns were forming the bastions. One of the above mentioned machine-gun pits, that of the south eastern angle may still be seen and will give a thorough idea of the organization. The observation-post of the railway station, one of the main O. P. s. of the Belgian front, had a vast field of view and was provided with visual apparatus of the highest precision. It was connected in 1917, by means of two telephone wires with alternative courses, to Dunkirk signalling post and that, in order to warn the city of the firing intended for her by the Leugenboom gun. The report of the monster, perceived at Pervyse was at once communicated to Dunkirk where the receiving station was to alert the town by means of the powerful steam-whistles or other such alarm signals. 11.—Battalion commander’s Headquarters at Km. 4.400 of the Nieuport-Dixmude railway line. That concrete dug-out served as battle Headquarters to the major commanding the Oud-Stuyvekenskerke subsector. It was of that type adopted for such shelters prompted along the railway line. These emplacements were generally constructed in the years 1916 and 1917 to take the place of the far less resisting ones whose walls as well as roofings were formed by beams and logs in juxtaposition. The roof had been rendered waterproof by means of tarred board, while a more or less thick layer of bags filled with concrete rendered them safe against small shells. These which replaced them, some of which are still remaining such that of kilom. 4.400, were very well conceived. They often contained several different rooms, the number of which were varying according the need of the sector: major’s orderly room, major’s and adjutant’s lodging, visual signalling and very-light posts, telephone central, etc.... 12.—The base of the tower of Oud-Stuyvekenskerke. The old tower of Oud-Stuyvekenskerke has not been able to resist to the amount of projectiles poured upon it by the Germans, throughout the whole campaign. Its emplacement however, and the concrete bloc which has taken its place are interesting as marking the extreme advance of the enemy in the region, it also brings back to memory the terrific bombardments and fights which that corner of Flanders witnessed. [Illustration: DIXMUDE.—Aerial photo (Mai 26^{th} 1917). ]