"I never saw two sleep better," replied Weber. "Mr. Wharton was a little troubled in his slumbers though."

"Oh, he's a very grave individual with great responsibilities," said Carstairs.

But he did not add anything about the dispatches.

"A little farther back," said Weber, "I saw a biplane. Although it was high in air I'm quite sure from its make that it was German."

"Scouting," said John. "It was pretty venturesome to come this far west."

"The Germans shun no risks," said Weber, gravely. "The biplane flew back toward the east. It did not alarm me greatly, but I saw another thing that did. Just before you awoke I noticed a gleam in the valley to the right, and I know that it was made by a sunbeam falling on the spiked helmet of a Uhlan."

The three stiffened with alarm, not so much for themselves as for their errand. Wharton's hand moved again toward the pocket, containing the papers, which had transformed him into a man with but a single thought.

"Uhlans here close to this road!" exclaimed John.

"Do you think it can be von Boehlen?"

"It may be. On the whole I think it probable," replied Weber. "Von Boehlen is a most daring man, and to scout along the skirts of the French army would be the most natural thing for him to do. I'm going to speed up a bit--that is, if you gentlemen agree that it's necessary."

"Of course," said John, and the machine sprang forward. He had taken the prince's gla.s.ses as his own share of the spoil. They were of great power, and now he searched the forest with them for their enemies. He soon found that Weber was right. He saw steel helmets on the right, and then he saw them on the left. They were surely Uhlans, and evidently they had seen the car.

He quickly put away the gla.s.ses and s.n.a.t.c.hed up his rifle.

"You were right, Weber," he exclaimed. "They're German cavalry, and they've begun to pursue us. Faster! Faster! This machine can leave any hors.e.m.e.n behind!"

Weber turned back a despairing face.

"The car is doing its best!" he said. "Something has gone wrong with the machinery!"

He wrenched at the wheel, but he produced no such speed as that which Carstairs had got out of the car, when they were fleeing from the German automobiles. The two forces of Uhlans had now joined and were in the road galloping in swift pursuit. Many of them carried lances, which glittered in the late sun. The sight of the steel points made John shiver. It would be horrible to feel one of them in his back.

He turned to his machine gun. A touch of that old madness returned. The sight of the Uhlans had set his brain on fire.

"I'll teach you not to come too close, my fine lads," he said.

He aimed the gun and undertook to start the mechanism, but nothing moved. No shots came. He jerked at it widly, but it refused to budge. It was jammed, and it would take a long time to put it in order. His heart stood still and a cold perspiration came out on his face. How did it happen? Was it possible that he had left it in such a condition?

"What's the matter, John?" asked Wharton.

"The machine gun's jammed, and I can't fire a shot. The car seems to be breaking down, too. Don't you see that the Uhlans are gaining!"

"So, they are," said Wharton.

He and John s.n.a.t.c.hed up their rifles and fired rapidly at the hors.e.m.e.n.

Some of the bullets struck, but did not impede the pursuit. Carstairs pushed Weber out of the driver's seat, and seized the wheel himself. All his pride and confidence were aroused, and he did not have time to be polite. He could get the speed out of that machine and save them.

But it did not obey his hand. It staggered along like a tired man. Weber was right again. Something had gone wrong with the internal organism, and one could not stop to right it with pursuing Uhlans only a few hundred yards away.

"What shall we do?" exclaimed Weber. "Shall we jump for it and run? We may escape in the shelter of the forest?"

"Not yet," replied Carstairs firmly. "Not yet for three of us, though it may be best for you, since you'll be executed as a spy, when you're taken."

"If you don't go, I don't go either," said Weber. "We'll all stay together."

"Brave man!" said Carstairs admiringly. But he had time for no more words. He was wrenching at the machine as a rider for his life would pull at the mouth of a stubborn horse. Crippled as it was he managed to drag a little increase of speed from it. The Uhlans had dropped back somewhat and none of them fired. John believed that they refrained because they were sure of a capture. Wharton suddenly uttered a cry.

"A river," he exclaimed. "It's not more than five hundred yards ahead!"

His cry was echoed by Weber, but its tone was very different. The Alsatian's voice showed despair.

"I had forgotten," he exclaimed. "The river is too deep for fording, and the French have blown up the bridge! We're trapped!"

A deep flush came into the face of Carstairs. As in the case of John a touch of his first madness was returning. The three comrades were now wild together.

"Can you swim?" he shouted back to John.

"Yes!"

"And you?" to Wharton.

"Yes!"

"And you, too?" to Weber.

"Yes, fairly well; but what do you mean?"

"You wait two or three minutes and you'll see something. But when it's time to swim all of you be ready for it!"

A great shout came from the Uhlans, who had begun to gain again, and who could not now keep from seeing the river that cut off the fugitives. But Carstairs wrenched another pound or two of speed out of the automobile, and it shot forward.

"Stop! Stop for G.o.d's sake!" cried Weber. "You'll drown us all! It's better to jump out and take to the woods!"

"Never!" cried Carstairs, his daring flaming to the utmost. "We captured the automobile of a prince, and we'll not give it back again! Ah, the machine is returning to life! Look how much faster we're going! On, my beauty! Your last and greatest run is before you!"

The machine seemed to come out of its maimed and crippled condition, its strength flaring up for the last burst of speed. The jarring and jerking ceased and the road flew behind it.

The river came near at an astonishing rate, and John saw that it was wide and deep. He saw, too, the pillars of the ruined bridge, and he heard another cry from Weber, who started to spring out, but drew back.

Carstairs uttered a wild shout, and then the automobile, leaping far out into the stream, where the bridge had been, sank beneath the deep waters. John had prepared himself for the desperate stroke, and before the machine touched the surface he had sprung clear. Then he struck out desperately for the opposite bank, and his heart filled with gladness, when he saw Wharton and Carstairs swimming almost by his side.

They reached the sh.o.r.e before the Uhlans could come up, and darted into the shelter of the forest, where they threw themselves down on the ground and lay panting, every touch of wildness gone.

"Is Weber here?" asked John.

"No," replied Wharton, who felt of his papers again, and saw that they were wet, but safe.

"Did either of you see him?"

"Not after the auto made its jump."