"It certainly is," exclaimed Jacques. "I guess the most of the shells on that train will never do the Allies much harm."

Under the bright starlit sky the giant monoplane winged its way back to its hangar. Unerringly the skillful young pilot guided the great flier; never for a moment did he appear to be at a loss as to what course to pursue. He flew at a great height, and though an occasional shot was directed at the phantom machine so high above their heads, the Germans were unable to do it any damage.

Finally they crossed the battle-line. Apparently a night attack was in progress and the path of the trenches could be followed from the flame of bursting projectiles.

"Think what those fellows down below are going through now," exclaimed Earl feelingly.

"I don't envy them," said Leon.

"Nor I," agreed Jacques. "We've all been through that though and I suppose we will soon again."

"Perhaps to-morrow even," exclaimed Earl. "I wonder where the douzième is now."

"Probably in the thick of that fight," said Leon.

"They are if they have anything to say about it," agreed Jacques warmly.

"What a crowd they are," exclaimed Earl.