The car stopped. We were at the wireless and telephone headquarters for the French Army of the North. It was a low brick building, and outside, just off the roadway, was a high van full of telephone instruments. That it was moved from one place to another was shown when, later in the day, returning by that route, we found the van had disappeared.

It was two o'clock. The German wireless from Berlin had just come in. At three the receiving station would hear from the Eiffel Tower in Paris. It was curious to stand there and watch the operator, receivers on his ears, picking up the German message. It was curious to think that, just a little way over there, across a field or two, the German operator was doing the same thing, and that in an hour he would be receiving the French message.

All the batteries of the army corps are—or were—controlled from that little station. The colonel in charge came out to greet us, and to him Captain Boisseau gave General Foch's request to show me batteries in action.

The colonel was very willing. He would go with us himself. I conquered a strong desire to stand with the telephone building between me and the German lines, now so near, and looked about. A French aëroplane was overhead, but there was little bustle and activity along the road. It is a curious fact in this war that the nearer one is to the front the quieter things become. Three or four miles behind there is bustle and movement. A mile behind, and only an occasional dispatch rider, a few men mending roads, an officer's car, a few horses tethered in a wood, a broken gun carriage, a horse being shod behind a wall, a soldier on a lookout platform in a tree, thickets and hedges that on occasion spout fire and death—that is the country round Ypres and just behind the line, in daylight.

We were between Ypres and the Allied line, in that arc which the Germans are, as I write, trying so hard to break through. The papers say that they are shelling Ypres and that it is burning. They were shelling it that day also. But now, as then, I cannot believe it is burning. There was nothing left to burn.

While arrangements were being made to visit the batteries, Lieutenant Puaux explained to me a method they had established at that point for measuring the altitude of hostile aëroplanes for the guns.

"At some anti-aircfaft batteries," he explained, "they have the telemeter for that purpose. But here there is none. So they use the system of visée laterale, or side sight, literally."

He explained it all carefully to me. I understood it at the time, I think.

I remember saying it was perfectly clear, and a child could do it, and a number of other things. But the system of visée laterale has gone into that part of my mind which contains the Latin irregular verbs, harmonies, the catechism and answers to riddles.

There is a curious feeling that comes with the firing of a large battery at an unseen enemy. One moment the air is still; there is a peaceful plain round. The sun shines, and heavy cart horses, drawing a wagon filled with stones for repairing a road, are moving forward steadily, their heads down, their feet sinking deep in the mud. The next moment hell breaks loose. The great guns stand with smoking jaws. The message of death has gone forth. Over beyond the field and that narrow line of trees, what has happened? A great noise, the furious recoiling of the guns, an upcurling of smoke—that is the firing of a battery. But over there, perhaps, one man, or twenty, or fifty men, lying still.