hink it my
duty to run!"

"Oh!" exclaimed Andy, "you mean you'd coax 'em to follow us back to
Bloomsbury, and then give themselves up, is that it, Frank? Oh! but
you're a cunning chap, sure you are. But on the level now, what is our
game, if it doesn't mean we're going to overtake 'em?"

"I'll tell you, Andy. We ought to keep following after them as far as we
can, and in that way learn where they drop. If we get a chance to send
down an occasional message to be sent on to Bloomsbury so much the
better. I've written several such out, and have the cord to tie them to
weights. Given a chance, when we're passing over some town perhaps we
can get one such message sent on home. Even that would tell them where
we were, and what the chances are."

"Great game, Frank! Suppose you let me have those messages, and I'll be
amusing myself getting the same ready to heave, when you say the word.
We c'n play that this is a war game, and we've been sent out to drop
bombs on the fortifications of the enemy. We've done it with rocks, and
we can throw pretty straight; so it seems to me we ought to get some
sort of fun out of it all around."

Frank told him where he could find the written messages in his outer
pocket; and for some time Andy was quiet, busying himself in fastening
some sort of anchor to each piece of paper, sufficient to carry it
earthward, despite the breeze that at the time might be blowing.

All at once Andy noticed that they were going quite slowly in comparison
with the pace they had lately been "hitting up."

"What's happening, Frank?" he exclaimed, almost alarmed lest some
accident had befallen the reliable little motor, which up to now had
never failed them, no matter how great the call upon its resources. "Why
are we slowing up? Is there something gone wrong, and must we own up to
being beaten?"

"Look ahead at the biplane!" was all that Frank replied.

CHAPTER XIX

DROPPING A "BOMB!"

"Oh! we've started to swoop down on them! Honest to goodness, I don't
believe they're more 'n half as far ahead as they were, Frank!" cried
Andy, thrilled by the sight of the other biplane being so near.

"Just about that," said Frank, quietly, the busy motor having decreased
its merry hum, so that they could talk without raising their voices very
much.

"Then you must have let out an extra kink, did you, Frank, when I was
busy with my bombs?" demanded the other.

"Oh! no," came the answer, "the fact of the mat