Twenty-four hours later you hear that that house was levelled to the ground next morning—a shrapnel shell on each side of it to get the range—a high explosive into it to burst it up—and an incendiary shell to burn the rubbish; and one more French family is homeless.

It takes you some time to realise that it was you who burnt that house—you and that working party which moved past the cross-roads so often. Somebody must have seen you when the shell burst alongside that hedge. Somebody must have been watching you all the time when you were loitering with your map at that corner. Somebody, at any rate, must have been marking down from the distance everything that happened at those cross-roads. Somebody in the landscape is clearly watching you all the while. And then for the first time you recall that those grey trees in the distance must be behind the German lines; that distant roof and chimney notched against a background of scrub is in German ground; the pretty blue hill against which the willows in the plain show out like a row of railway sleepers is cut off from you by a barrier deeper than the Atlantic—the German trenches; and that from all yonder landscape, which moves behind the screen of nearer trees as you walk, eyes are watching for you all day long; telescopes are glaring at you; brains behind the telescopes are patiently reconstructing, from every movement in our roads or on our fields, the method of our life, studying us as a naturalist watches his ants under a glass case.

Long before you get near the lines, away over the horizon before you, there is floating what looks most like a flat white garden grub—small because of its distance. Look to the south and to the north and you will see at wide intervals others, one after the other until they fade into the distance. Every fine day brings them out as regularly as the worms rise after rain; they sit there all day long in the sky, each one apparently drowsing over his own stretch of country. But they are anything but drowsy. Each one contains his own quick eyes, keen brain, his telescope, his telephone, and heaven knows what instruments. And out on every beautiful fresh morning of spring come the butterflies of modern warfare—two or three of our own planes, low down; and then a white insect very, very high—now hidden behind a cloud, now appearing again across the rift. It is delightful to stand there and watch it all like a play. The bombs, if they drop 'em, are worth risking any day.

But it isn't the bombs that matter, and it isn't you who run the risk. The observer is not there to drop bombs, in most cases, but to watch, watch, watch. A motor standing by the roadside, a body of men about some work, extra traffic along a road—and a red tick goes down on a map; that is all. You go away. But next day, or sometimes much sooner, that red tick comes up for shelling as part of the normal day's routine of some German battery.

So if these letters from France ever seem thin, remember that the war correspondent does not wish to give to the enemy for a penny what he would gladly give a regiment to get. On our way back is a field pock-marked by a hundred ancient shell-holes around a few deserted earthworks. On some bygone afternoon it must have been wild, raging, reeking hell there for half an hour or so. Somebody in this landscape put a red tick once against that long-forgotten corner.


CHAPTER IV

THE ROAD TO LILLE

France, April.

There is a house at a certain corner I passed of late. On it, in big white letters on a blue ground, is written "To Lille." Every township for a hundred miles has that same signpost, showing you the way to the great city of Northern France. But Rockefeller himself with all his motor-cars could not follow its direction to-day. For the city to which it points is six miles behind the German lines. You can get from our lines the edge of some outlying suburb overlapping a distant hill-top.