rolled over gun and gunners alike.
And now Sergeant Coffee and Corporal Wallis groped about in that blinding mist. There had been two systems of listening-posts hidden in it, each of admittedly little fighting value, but each one deep and composed of an infinity of little pin-point posts where two or three men were stationed. The American posts, by their reports, had assured the command that all enemy tanks were on the other side of a certain definite line. Their own tanks, receiving recognition signals, passed and repassed among them, prowling in quest of invaders. The enemy tanks crawled upon the same grisly patrol on their own side.
But two miles of the American front had suddenly gone silent. A hundred telephones had ceased to make reports along the line nearest the enemy. As Coffee and Wallis stumbled about the little pillbox, looking for some inkling of the way in which the original occupants of the small strong-point had been wiped out, the second line of observation-posts began to go dead.
Now one, now another abruptly ceased to communicate. Half a dozen were in actual conversation with their sector headquarters, and broke off between words. The wires remained intact. But in fifteen nerve-racking minutes a second hundred posts ceased to make reports and ceased to answer the inquiry-signal. G.H.Q. was demanding explanations in crisp accents that told the matter was being taken very seriously indeed. And then, as the officer in command of the second-line sector headquarters was explaining frenziedly that he was doing all any man could do, he stopped short between two words and thereafter he, also, ceased to communicate.
Front-line sector headquarters seemed inexplicably to have escaped whatever fate had overtaken all its posts, but it could only report that they had apparently gone out of existence without warning. American tanks, prowling in the area that had gone dead, announced that no enemy tanks had been seen. G-81, stumbling on a pill-box no more than ten minutes after it had gone silent, offered to investigate. A member of her crew, in a gasmask, stepped out of the port doorway. Immediately thereafter G-81's wireless reports stopped coming in.
THE situation was clearly shown in the huge tank that had been built to serve as G.H.Q. That tank was seventy feet long, and lay hidden in the mist with a brood of other, smaller tanks clustered near it, from each of which a cable ran to the telephones and instruments of the greater monster. Farther off in the fog, of course, were other tanks, hundreds of them, fighting machines all, silent and motionless now, but infinitely ready to protect the brain of the army.
The G.H.Q. maneuver-board showed the battle as no single observer could ever have seen it. A map lay spread out on a monster board, under a pitiless white light. It was a map of the whole battlefield. Tiny sparks crawled here and there under the map, and there were hundreds of little pins with different-colored heads to mark the position of this thing and that. The crawling sparks were the reported positions of American tanks, made visible as positions of moving trains had been made visible for years on the electric charts of railroads in dispatcher's offices. Where the tiny bulbs glowed under the map, there a tank crawled under the fog. As the tank moved, the first bulb went out and another flashed into light.
The general watched broodingly as the crawling sparks moved from this place to that place, as varicolored lights flashed up and vanished, as a steady hand reached down to shift tiny pins and place new ones. The general moved rarely, and spoke hardly at all. His whole air was that of a man absorbed in a game of chess—a game on which the fate of a nation depended. He was thus absorbed. The great
