Jacques quickly.

"The German machine, you mean?" queried Leon.

"Yes. They are very fast too."

"He'll never come over our line though," said Earl. "He'll turn back soon."

"There goes another of our machines up to help," exclaimed Leon.

From the aviation field in the rear of their quarters came a great clatter and noise. A moment later a big monoplane came into view and rising rapidly higher and higher set out to the aid of its companion.

Meanwhile the first aviator, pursued by the German fokker, had evidently determined to give battle. He dipped suddenly and shot downward at incredible speed. All about him the bombs from the high-angle guns of the enemy were exploding and it did not seem possible that he could escape. The cheering of their comrades in the trenches came faintly to the ears of the three watching boys.

"He'll be hit," cried Leon tensely.

"Wait," cautioned Jacques.

The aeroplane still raced towards the earth. Suddenly it began to rise and up, up, it soared. Higher and higher it went, describing huge circles in its flight. The little white clouds all about told with what zeal its destruction was sought, but still it kept on. Now it had reached a level as high as the giant fokker. Meanwhile the other French machine raced to its aid.

"You'll see the German turn back now," predicted Jacques.

"Why shouldn't he?" demanded Earl. "It's two to one."

"His only hope is to disable the first machine before the other comes up," said Jacques. "Otherwise he'll have to run for it."

"How high do you suppose they are now?" asked Earl.

"Five thousand feet," said Leon. "Is that about right, Jacques?"

"I should think so; just about," replied the young Frenchman.

Almost every soldier in the great camp was standing, gazing skyward at the combat going on among the clouds over their heads. These duels in the air were not infrequent but they never lost their power to thrill. To see two huge mechanical birds each maneuvering for a chance to strike a death blow to its rival was a sight to stir the blood of any man, no matter how often he had seen its duplicate before.

"What did I tell you?" demanded Jacques suddenly.

The fokker turned at the approach of its second enemy and in full retreat made for the German lines. The two French machines did not attempt a pursuit, but after one or two triumphant circles were headed for home. A few moments later they passed directly over the spot where the three young soldiers were seated, on their way to their respective hangars.

"Why didn't they chase that fellow?" exclaimed Leon. "They were two to one and it seems to me they had a great chance to bring him down."

"You must remember this," Jacques reminded him. "He had a good start on them and, if anything, had a faster machine than theirs. Then that scout of ours may have very important news for headquarters as a result of his observations. He probably wants to report as soon as he can."

"That's true," said Leon. "I had almost forgotten this attack to-morrow I got so excited watching the aeroplanes."

"You started to tell what Captain Le Blanc said," Earl reminded his brother. "Go ahead and finish what you heard."

"Well," said Leon, "he said that everything was ready. He even knew the number of German batteries that will be opposed to us; he also knew just what regiments hold the line opposite. He said that along the whole length of our front line steps had been cut in the trenches so that we can climb out easily. The barbed-wire entanglements have had little lanes cut through them every few feet so we can get through without any trouble."

"Whew," whistled Earl. "It looks as if we meant business all right."

"We surely do," agreed Leon. "We're to carry along bridging to form pathways across the German trenches so we can bring up our guns and supplies quickly. All shoes and extra clothes and blankets are to be turned into the quartermaster; every man is to put on clean underclothes so that if he is wounded he won't be infected. You're to have your gas-masks ready and every one will receive one hundred and thirty extra rounds, making two hundred and fifty in all."

"When do we move into the trenches?" asked Jacques.

"Ten o'clock to-night."

"And final inspection is when?"

"One hour before that."

"We'd better get ready," exclaimed Jacques. "It's almost supper-time now and we've got lots to do."

Every man who passed their tent seemed, to be unusually business-like. No one seemed nervous or worried, but perhaps a little more serious than usual. But there was not a man among all those thousands who was not glad that on the morrow he was to come up out of his hole in the ground and meet his enemy face to face. An air of quiet confidence pervaded the camp; the air was full of it and one glance at these grim-visaged warriors of France was enough to convince any observer that they were eager for the battle to come.

CHAPTER II

PREPARATIONS

At nine o'clock that evening all arrangements had been completed and the final inspection held. The last letters were deposited at the regimental post-office, a most solemn ceremony. Many a long thought passed through the minds of the soldiers as they mailed what might be their final messages to their loved ones.

"I don't like this business of hanging around," whispered Jacques in Leon's ear. "I'd like to get started."

"So should I," agreed Leon. "It seems sort of weird standing here in the darkness with thousands of men all about you, all waiting for the same order that we are."

The night was clear and the stars were unusually brilliant. Not a cloud appeared and the long lines of troops resting on their arms looked like misshapen hedgerows in the faint light. The roar of the French artillery came distinctly to the ears of these men who stood and waited. Every man knew why it was that its activity was so greatly increased that night. Their guns were playing a stream of metal death on every yard and foot and inch of the opposing trenches. Not a spot in the German lines but was being searched by these great mechanical monsters.

"Listen!" warned Earl suddenly.

Nearby some man had started to sing the Marseillaise. Soon others joined in and the chorus swelled as man after man lent his voice to that stirring anthem. In a few moments every soldier present was singing and even the roar of the great guns became faint and indistinct as the thousands of throats chanted the great hymn of victory.

A thrill ran up and down Leon's spine. He used to regard the Marseillaise as the national anthem and had often heard it sung without any particular feeling. Since the war had started, however, it had seemed different to him. As the soldiers sang it, biting out each word sharp and short, it had become a battle-cry. He realized how terribly in earnest these Frenchmen were who stood there in the darkness and hurled defiance at their German foes.

At length the order came to move. Slowly the column moved out of the camp and turning to the right marched down the road leading to the trenches. On both the right and left could be seen other columns moving in parallel lines and in the same direction.

"Who are they?" whispered Earl.

"I can't tell," replied Jacques in answer to his comrade's query. "Both regiments are attached to our division though, I think."

Slowly and at the same pace the three columns advanced. The men were unusually quiet and none of the customary bantering was present. Perhaps every man was busied with the thought of what was going to happen to him at quarter past nine the next day.

"This seems like a funeral march," exclaimed Leon in a low voice.

"And I don't like it, either," added Earl.

"Wait," cautioned Jacques. "Everyone's spirits will revive in a few minutes. The strain will wear off soon."

His