in a new quarter.

What he and his chum had been talking of that very morning was still
fresh in his mind. How he would like to discover one of those unusual
nests where half a dozen or more gun crews lurked, ready to hold up that
entire sector of the advancing line, so the American troops would be
unable to reach their objective for that day at least.

So it was in the hope of attaining this end that he now flew to another
section of the forest which he had been desirous all morning of
visiting, under the impression that it might yield the bag to which he
aspired in his search for game.

As they circled over the tree tops Morgan was turning his glasses to the
best advantage. Jack kept trying to cover the ground systematically, and
yet making numerous quick jumps so as to disconcert the enemy should a
sudden fierce burst of firing announce that a nest had been located.

All at once Morgan gave a loud cry. It seemed to spell victory, and Jack
instantly called out:

"Struck oil, have you, Felix? Where away does it lie?"

"Look down to the left and you'll just glimpse what seems to be the
stone base of an old abandoned windmill, I think, Jack. All overgrown
with weeds and brush, it is too. I saw a number of men moving about,
and some of them were crouching back of their biggest machine-guns. This
is one of those jumbo forts we've heard of; no mistake about it either."

"Grab off the location to a dot then, Felix, and we'll see what can be
done for those waiting Yankee batteries!" snapped Jack, greatly excited,
as well as pleased, by their important discovery. "Let me know when you
have your landmarks, and I'll elevate, so we can get in touch with the
battery observer."

"It's the king-pin of all their nests, Jack, a regular bouncer, I tell
you!" cried the other, using his glasses again to advantage.

"All right then," the pilot assured him, "we'll see that their name is
mud before much longer. Ready, Felix?"

Instead of giving Jack the reply which the other expected the observer
gave a sudden startled yell.

"They've got us trapped, Jack! Sure they have! Look up!" came his
warning shout, and as the pilot craned his neck to obey he discovered no
less than three big German Gotha battleplanes hovering over them,
waiting to engage them in a most unequal combat.

CHAPTER VII

"MOPPING 'EM UP!"

FROM below there suddenly burst a dangerous bombardment. The German
gunners hidden in the camouflaged pile of