“Certainly, I intend to ask about that very thing,” came Jack’s ready reply, “and I’m also in great hopes they’ll be able to add some news worth while, that, in conjunction with what we already know, or suspect, will put us sleuth hounds on the hot trail of the big millionaire they feel certain has been the main backing of the whole ugly bunch while keeping in the background himself all the while. They’re depending on you and me, Perk, to produce the evidence that’s going to convict him of conspiracy against the Government, which may send him to Atlanta for a dozen years or more.”

“Know how long you’ll be away, Jack?” demanded the other casually as if it was really a matter of but little moment to him what the answer might be, since he could be depended on to hold to their booty with the tenacity of a leech.

“That all depends on circumstances–I may be back by noon, and again not till late in the afternoon or evening. I expect to fetch a couple of sandbaggers along who will take over the sloop and stuff that’s aboard. Having washed our hands clean of those encumbrances we’ll be in fit shape to delve deeper into the game and see what we get out of the grab-bag. Anyway, don’t expect me until you see me heading this way and keep a sharp lookout, for from all accounts this crowd we’re up against is said to be a tricky combination, always stepping on their toes and doing big things.”

“Yeah, we’ve heard lots o’ that kind o’ stuff but just the same the lads makin’ up the crew o’ this sloop didn’t keep their eyes open, or they’d never been taken unawares by them hijackers. Leave it to Gabe Perkiser to hold fast to what he’s got; they’d have to be a regiment, armed with machine-guns, bombs, an’ even gas, to knock me off’n my perch an’ I don’t mean that for boastin’ either, Jack.”

Later on Jack decided it would be just as well for him to jump off and be on his way to Tampa. Contrary winds or something else might delay his arrival, and an early start was bound to be of much help toward bringing a quick return.

He first used the binoculars in order to scan the heavens as well as they could be covered when he was so surrounded by those strange mangrove islands and discovering no sign of any cruising, spying crate, he bade Perk goodbye and taxied in the direction of the open gulf, which he knew lay due west.

Perk answered his signal ere the amphibian turned a bend in the tortuous channel and saw Jack vanish from view; nor could he long detect any sound to indicate the presence of an airship since cautious Jack had again made use of that wonderful “silencer” which they had found so useful while conducting their search during the preceding night. Then the appointed guardian of the captured contraband sloop turned his attention to matters which had to do with his making the tied-up craft as thoroughly invisible from the upper air as he knew how.


CHAPTER XI
PERK HOLDS THE FORT

First of all Perk set about getting the one boat that had been left aboard the smuggler sloop into the water as he would need it for conveying his green material with which he intended to cover the exposed deck.