“Is that a gas attack warning, Dave?”

“That’s just what it is, Phil! The Germans must be launching such an attack!”

“That’s bad!”

“Notify the others at once, Phil. Tell the men I want them to take no chances, but get their masks on and keep them on until they are dead sure it is perfectly safe to take them off.”

“But what are you going to do?”

“I’m going out to look for Roger. If he’s lost in the woods, or if he’s been wounded and is without a mask that will work, he’s in danger of his life.”

“But you said I could go along!”

“All right, then, follow me. But warn all the others first,” answered Dave; and then hurried off through the rain-soaked wood on the hunt for his missing chum.

CHAPTER II
THE GAS ATTACK

“I’ve got to find Roger—I’ve got to do it!”