minute."

"I don't think there'll be any gun fire this time before we go over the
top," ventured Frank.

"What do you mean?" asked Bart in surprise, as he turned his head toward
his chum.

"Do you know anything?" queried Tom.

"Not exactly know, but I've heard enough to make a guess," replied
Frank. "I think we're going to play the game a little differently this
time. Unless I'm mistaken, the Huns are going to get the surprise of
their lives."

"Put on gas masks!" came another order, and in the six seconds allowed
for this operation the masks were donned, making the men in the long
line look like so many goblins.

It was light enough for them to see each other now, for the gray fingers
of the dawn were already drawing the curtain of darkness aside from the
eastern sky.

One minute more passed--a minute of tense, fierce expectation, while the
boys gripped their rifles until it seemed that their fingers would bury
themselves in the stocks.

Crash!

With a roar louder than a thousand guns the earth under the German