A little before dusk we started off and proceeded along various roads towards the new line. All the country was now brand new to me, and full of interest. After we had gone about a mile and a half the character of the land changed. We had left all the Plugstreet wood effect behind, and now emerged on to far more open and flatter ground. By dusk we were going down a long straight road with poplar trees on either side. At the end of this stood a farm on the right. We walked into the courtyard and across it into the farm. This was the place the battalion we were going to relieve had made its headquarters. Not a bad farm. The roof was still on, I noticed, and concluded from that that life there was evidently passable. We had to wait here some time, as we were told that the enemy could see for a great distance around there, and would pepper up the farm as sure as fate if they saw anyone about. Our easy-going entry into the courtyard had not been received with great favour, as it appeared we were doing just the very thing to get the roof removed. However, the dusk had saved us, I fancy. [Illustration: Comin' on down to the Estaminet tonight, Arry?] As soon as it was really dark we all sallied forth, accompanied by guides this time, who were to show us the trenches. I crept along behind our Colonel, with my eyes peeled for possible gun positions, and drinking in as many details of the entire situation as I could. We walked about ten miles that night, I should think, across unfamiliar swamps and over unsuspected antique abandoned trenches, past dead cows and pigs. We groped about the wretched shell-pitted fields, examining the trenches we were about to take over. You would be surprised to find how difficult a simple line of trenches can seem at night if you have never seen them before. You don't seem able to get the angles, somehow, nor to grasp how the whole situation faces, or how you get from one part to another, and all that sort of thing. I know that by the time I had been along the whole lot, round several hundred traverses, and up dozens of communication trenches and saps, all my mariner-like ability for finding my way back to Neuve Eglise had deserted me. Those guides were absolutely necessary in order to get us back to the headquarter farm. One wants a compass, the pole star, and plenty of hope ever to get across those enormous prairies--known as fields out there--and reach the place at the other side one wants to get to. It is a long study before you really learn the simplest and best way up to your own bit of trench; but when it comes to learning everybody else's way up as well (as a machine gunner has to), it needs a long and painful course of instruction--higher branches of this art consisting of not only knowing the way up, but the _safest_ way up.