did not dare trust Casper Blue. He
could see that the little man was a desperate character, and that he did
not view the prospect of being made a prisoner, and taken back to
Bloomsbury with any great show of enthusiasm. In fact, it was a most
unpleasant proposition for the bank thief to contemplate at all.

And so Frank was watching him closely. He had, before starting on this
dangerous air flight that had ended so far from home, and under such
singular conditions placed a little pistol in his pocket, though hardly
under the belief that he would have any occasion to make use of it.

But he was now determined not to let this man get the upper hand. He
could see that various desperate plans must be forming in that scheming
brain of the one-time aviator, and now yeggman; and Frank was constantly
on the watch so that he might not be caught napping.

"Four o'clock!" repeated Andy; "that would mean at least two more hours
before the sun set, wouldn't it; and even after that it might stay light
enough another hour for them to see us if they steamed along?"

"You mean the people aboard that tug, don't you?" asked Casper Blue,
sneeringly.

"Yes, they seemed to be chasing after us, and I only hope they do keep
moving," replied Andy, "because they must have seen the accident, that
is if they had any sort of a marine glass aboard, which I reckon they
did."

"And I suppose, now, you think there might be officers aboard that same
tug?" the other went on to say.

"Oh! we don't know anything about that," Andy remarked, carelessly. "But
if they came along after a while it'd save us from a lot of worrying.
Just think, if the night set in, and the four of us weighing this poor
old hydroplane down like we are what a time we'd have before another
morning came around."

"It would like as not rise, if there was only two aboard, wouldn't it?"
Casper asked quickly, and before Andy could understand what his question
meant he had replied to it.

"Sure thing, Frank and myself have left the water many a time in a less
powerful hydroplane than this, haven't we, Frank?"

"Well, turn about is only fair," said Casper, fiercely.

"Why, I don't understand what you mean by that," complained Andy.

"Two's company, four a crowd; so please skip out of this, both of you
boys. My pal and me can run this shebang, and just take my word for it,
we mean to do the same. Get that straight, both of you? Now, jump, I
tell you, and lively, or I might be t