front of the mill. Caution was necessary, for with the collapse of the
front wall and part of the sides, the floor supports were weakened.

"No telling where that shell landed," declared Bob. "It's buried deep,
and about ten tons of mortar and bricks are on top of it. If we had
seen it coming----"

"Look out--duck!" suddenly yelled Franz, as he grabbed Jimmy, who was
nearest him and darted toward the rear of the structure.

"What's the matter?" cried Bob.

"Another shell coming!" shouted Franz, and, even as he spoke there was
that horrid screeching sound. "Duck!"

Together they ran to the farthest corner of the old mill. Whether it
would have been better to have tried to get out none of them stopped
to think. They were in a panic.

And then came the explosion, but so distant that it caused no more
than a mere rumble of the ground, and a faintly-felt concussion of the
now tottery building.

"Missed us that time," declared Roger. "But they're getting our
range."

"No, they didn't fire at us," declared Franz. "If they had they would
have hit us, for undoubtedly the gunners know the effect of that first
shot. The Huns aren't shooting at us purposely."