Each platoon has so many posts to “find” men for. No. 5 Platoon has three posts between the Lewis-gun position and the top of 76 Street; No. 6 finds two in the Fort and one between the Fort and the Loop; there is another post before you reach the Loop, found by No. 7, who also finds two in the Loop itself; while No. 8 finds the Matterhorn post and the top of 80 A. All these posts are composed of one bomber, who has a box of bombs with him and his rifle without bayonet fixed, and one bayonet man. There is no special structure about a “post”: it is just the spot in the trench where the sentries are placed. Sometimes one or two posts could be dispensed with by day, if one post could with a periscope watch the ground in front of both. The sentry groups are relieved every two hours by the platoon N.C.O. on trench duty. There is always an N.C.O. on trench duty, going the rounds of his sentry groups, in every platoon; and one officer going round the groups in the company. Thus is secured the endless chain of unwinking eyes that stretches from Dunkirk to Switzerland. There were two Lewis guns to every company. One had a position at the Fort, covering the ground between the Fort and the Loop; the other was just to the right of 80 A, where it had a good position sweeping the craters. The Lewis-gun teams found their sentries independently of the platoons, and had their dug-outs. A nice compact little affair was a Lewis-gun team; always very snug and self-contained. Company Headquarters were at Trafalgar Square, though later we changed to a dug-out half-way up 76 Street. Each platoon had a dug-out about fifty yards behind the front line, and as far as possible one arranged to get the men a few hours’ sleep in them every day; but only a certain percentage at a time. There were four stretcher-bearers and two signallers also at Trafalgar Square. Also a permanent wiring-party had its quarters here, a corporal and five men; they made up “concertina” or “gooseberry” wire by day, and were out three or four hours every night putting it out. They were, of course, exempt from other platoon duties. Each platoon had a pioneer to attend to sanitary arrangements, and other odd jobs such as fetching up soup; and each platoon had an orderly ready to take messages. At Company Headquarters, besides the officers’ servants, were the company orderly, and company officers’ cook. An officer on trench duty was accompanied by his servant as orderly.