As far as you can see the road is dotted with the little groups. Some of the poor people are riding; some follow a cart; some push perambulators.

Again the syren wails; again the tall plume of black smoke shoots up near the town; again the shower of wreckage drops from it.

Sleep is impossible. I get up and dress, and go to the mess for breakfast. We now know that the shells are bursting every seven minutes, and when six minutes have passed we talk less, and listen, and wait. There is the sudden crash, and through the window can be seen the earth shooting up in a field a little to our side of the town. The next shell is only a few fields away. I hurriedly finish the meal, and walk out of the mess to go to a hangar at the other end of the aerodrome, whose erection I am supervising.

I have just left the camp behind me, and am beginning to walk across the great field, when, in the very middle of it, some two hundred and fifty feet away, appears a solid black fountain of smoke and earth, quite seventy feet high. I stand transfixed with amazement and excitement as the roar of sound sweeps by me, and a few seconds later I hear the remote boom of the gun, twenty-eight miles away, near Ostend. The earth drops down again, the smoke clears, and I run panting across the ground to the low heap of earth which I can see in the distance, above the grass.

When I get there I find there is a huge crater some thirty-five feet across and twelve or fifteen feet deep. At the edge are two pilots, who shout breathlessly—

"We've got the base-plug! Look here! Don't touch it—it is almost red hot!"

There in the yellow loam lies the drum of clean white steel marked with the symbols M 38 and a crown. I touch it with a wettened finger and hear a quick hiss. The metal is unbearably hot still, and it is small wonder when it is realised that it has travelled twenty-eight miles, and risen and dropped thirty-three thousand feet in a little over a minute. Though it is only the base-plug, it is some twelve inches across, and later, when cold, requires removal in a wheelbarrow into which two men can scarcely lift it.

Meanwhile I search eagerly for fragments. I find half-hidden a twisted piece of metal, and am just about to lift it when the syren in the docks gives warning of the approach of the next shell. Taking advice from the axiom that a shell never falls twice in the same place, we slide down into the crater and wait, a little nervously. We hear the dull boom of the explosion, and scrambling to the top, see to the south of the hangars a cloud of smoke rapidly disappearing. The wind is evidently causing the shells to deviate, as they are falling farther and farther away from the town. The German spotting machines have been driven away by the British scouts, and so the gunlayers at Leugenboom (descriptive name!) are trusting to luck, as their early shells were so successful. One of the first, indeed, struck the Casino at Malo clean in the middle, and cut a slice out of it as with a knife. Only the previous night a divisional headquarters staff had moved into it, and thought it a rare billet after weary days behind the lines in the French sectors further south. Dawn brought to many of them a swift and unexpected death.

Carrying my hot lump of steel in my handkerchief I hurry over to the skeleton of the semi-erected hangar. The men, only naturally, seem little inclined to work. For five minutes they stand to their duty, and then, as the hooter blows, I give the order to take cover, and they go down the sides of the canal until the crash of the explosion shows that the menace has passed.

The French have very quickly organised the hooter system. Some one says that a look-out at the lines, on seeing the flash of the gun, presses a button which rings a bell in Dunkerque. The signal is sent on to the man in the light-ship at the docks, and he pulls the string of his syren. The complete operation only takes some ten or twelve seconds, and as the shell is travelling for well over a minute it gave ample warning. As a matter of fact, such a system, if it does exist, is not necessary, as the shells are falling at an exact interval of just over seven minutes.