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OVER THE ENEMY'S LINES

arrangements for a big time. You know what that means, when tens of thousands of poilus have to be transferred during the darkness of night, so that the enemy pilots can't glimpse the movement and give warning? So, unless the skies fall, we are bound to get busy this morning."

The air service boys were soon at the hangars, where an animated scene was taking place. Any one could see that something unusual was about to take place, because of the numbers of men rushing this way and that, while motors were popping and machine-guns being tried out so as to be certain they were in prime condition for service. Scores of mechanicians, chauffeurs, observers, as well as other helpers, went about their work of getting "ready for business."

The air fighters were dressed in their fur-lined union suits, with fur overcoats, gloves, and caps; for they would soon be soaring to great heights, where the atmosphere was almost Arctic in its intensity.

They were examining their automatic pistols, seeing that their airplane compasses, speed indicators, special airplane clocks, mounted on wire springs, and altitude barometers were in their proper places and in working order. Their very lives might depend on a little thing, and no one could afford to neglect even trifles.