"The others are evidently waiting for it to come back."

"How do you make out that?"

"Because they merely float about beyond our reach and don't try anything against us. The day's pa.s.sing, and if they didn't have some plan dependent on the machine that left, they'd be at work now trying to shoot us up."

Carstairs reached over and patted John on the head. "You talk sense, Scott," he said, "if it weren't for your accent you could pa.s.s for an Englishman."

"Then I'll see that he never changes his accent," said Wharton.

"I think I'll take a nap," said Carstairs, "and I really mean it. The gra.s.s and the bushes were heavy with rain when we came in here, although we didn't notice it, but the fine sun up there has dried everything now, and I've a good bed."

He lay very comfortably, with his head on a mound of turf, but he did not close his eyes. The lids were lowered but nevertheless he watched the heavens.

"Sorry for those poor horses of ours," he said. "One's killed and the other two, I suppose, will be scared to death before this thing's over."

"And then we'll have to walk," said Wharton.

"But we'll go on just the same."

"We can buy new horses, at the next village. No more walking for mine than I can help."

John was intently watching the eastern horizon. He was longing now for Lannes' powerful gla.s.ses. Nevertheless his eyesight was good, the best of the three, and presently the great pulse in his throat began to leap.

But he did not say anything yet. He wanted to make sure. He waited a minute and then he said:

"A black dot has reappeared in the eastern sky. It's so tiny you couldn't see it unless you swept your eyes around the circle until they met it."

Carstairs sat up.

"Where?" he asked.

"Begin as I told you and sweep your eyes around the circle."

"Ah, I see it now! Or maybe it's just a mote in the dancing sunbeams."

"Oh no, it's not. Watch it grow. It's an aeroplane, and I'd wager everything against next to nothing that it's the one that left a little while ago. Whatever it went to do it's done."

"Upon my soul, I think you're right. It is growing as you say. Now the dot becomes a black spot as big as an egg, now it grows to the size of your hand, and now the shape of a flying machine, coming at terrific speed, emerges. The whole process of departure is reversed."

"And it's making straight for that overhanging group," said Wharton.

John watched the big birds of prey await the messenger, and again he longed intently for Lannes' powerful gla.s.ses. The returning machine was received by the others which formed a circle about it, and for some minutes they hung there in close company.

His nerves began to quiver again with excitement. He was sure that it was a menace. The small aeroplane would not have gone away on a mission without some excellent reason. Sure of his leafy covert he stood up, and watched the group which now circled almost exactly over their heads.

Carstairs and Wharton stood beside him, and again they turned to him as the leader, now that it was an affair of the air.

"What do you make of it?" asked Carstairs, anxiously.

"It means harm, some new method of attack," said John, "but for the life of me I can't guess what it is."

"Then we've merely got to wait," said Wharton.

The three were standing close together, and a chill seemed to pa.s.s from one to another. That great danger threatened not one of the three doubted, and its mysterious character made it all the more formidable.

The aeroplanes drew apart a little and again circled about lazily. John began to have a hope that nothing would happen after all, when suddenly he saw a flash in the thickets and heard a stunning roar. A piece of metal whistled past his head, and leaves and twigs fell in a shower.

Acting partly from reason and partly from impulse he seized both Wharton and Carstairs and dragged them to the ground.

"A bomb!" he cried. "I had forgotten about bombs, although I've seen them used before. They had none with them and the little aeroplane went back to a hangar somewhere for a supply! They'll drop more and we'll be safer lying down!"

"You're right of course," said Wharton. "It's all as simple as day now.

There goes the second!"

Came another flash and roar, but this time the bomb fell farther away, and the metal fragments flew high over their heads. A third followed with the same result, and they began to feel encouraged.

"Of course they have to drop them at random," said John, "and throwing down bombs from an aeroplane high in air is largely an affair of chance."

"Still," said Wharton, "I feel as if I would like to burrow in the earth, not merely for a foot or two, but for at least a hundred feet, where the biggest bomb ever made by the Germans couldn't reach me."

Carstairs uttered a cry of joy.

"What can you find to be glad about in a situation like this?" asked Wharton.

"I've been poking through the bushes and I find just beside us a deep gully."

"A trench made and ready for us! Come, we'll be the boys in the trenches!"

They pa.s.sed through the bushes and dropped down in the gully which was in truth a great natural help to them. It was certain that in time a bomb would strike near, but unless it dropped directly on them they would be protected by their earthen walls from its flying fragments. And the odds were greatly against a bomb falling where they lay. The revulsion of feeling was so great that they became jovial.

"You've never agreed with me more than once or twice, Carstairs," said Wharton, "but I don't think you'll dispute it, when I say this is a fine, friendly little ravine."

"The finest I ever saw. I'm an expert in ravines. I made a specialty of 'em all through my boyhood, and I never saw another the equal of this."

"Now, they're guessing badly," said John, as a bomb burst in the far edge of the grove, some distances away.

"I wish we could find shelter for our horses," said Carstairs. "Those fellows in the air undoubtedly have gla.s.ses, and, not being able to see us, they may choose to demolish our remaining two beasts."

"There goes one now!" exclaimed John, as another bomb burst and a shrill neigh of pain followed.

A horse had been struck by two fragments, and wild with pain and terror it reared, struggled, finally broke its bridle, and galloped out into the fields, where it fell dead from loss of blood.

"Poor beast," muttered Carstairs, "I've always loved horses, and I'd like to get a little revenge."

"Maybe we can get it by waiting," said John, who was rapidly developing the qualities of leadership. "They can't possibly see us here in the gully which is lined thickly on either side with bushes."

"And you think if we lie quiet," said Wharton, "that they'll come down lower to see what damage they've done."

"That's my idea."

"You do seem to have a good head on you for a Yankee," said Carstairs.