CHAPTER XVIII

AN AEROPLANE CHASE

"Here it is, and everything seems all right!" remarked Andy as they reached the field, and found the hydro-aeroplane just where they had left it.

"Yes, no one has disturbed a thing, which I think is lucky for us," Frank went on to say, as he proceeded to put back the small part he had taken away with him, and thus place the machine in perfect condition for business.

Andy moved about, looking to see that all obstacles threatening to interfere with a successful launching were removed from in front of the waiting aeroplane.

So minutes passed, until at least ten had crept by since their coming. Frank had everything tuned up, and knew of not the least chance where he could improve the conditions of planes or motor, for all seemed to be as nearly perfect as they could be made.

Both boys cast frequent glances aloft, and as a rule toward that particular quarter where they presently expected to see something moving. They were keyed up to a pretty lively pitch of excitement, though Frank did not show it half as much as his younger cousin, who was always affected this way.

Then suddenly Andy called out:

"There she rises, Frank! Oh! look at them boring up, will you, in that corkscrew spiral way! Tell me that Casper Blue doesn't know his business; Perc will never get as much out of his biplane as that old and experienced aviator means to. Are we going to follow suit, Frank?"

"Get aboard!" came the prompt answer; and it was almost laughable to see how nimbly Andy obeyed this order.