Jack quickly noticed that Jethro was making no great attempt to force his smoothly working new engine. He could conceive of several good reasons for this caution—in the first place there was no need for haste; then again they would be going with the rapid current while descending the crooked stream; and last of all he could readily understand how there might be a variety of obstacles here and there, blocking their passage—logs, and huge boulders, which would surely cause the boat to founder, should they crash against some snag head-on.

On the return journey, whenever they chose to come back, the case must be different, since they would have the current to buck against, and necessarily much more power would be called upon to make decent progress.

However, Jack was not figuring as to just when that retrograde movement would come about—Perk had handed over a variety of things they would require if they chose to linger for a day and another night at least, even to some “eats”—catch Perk neglecting that part of the supplies—not if he was in his sane mind, he had told himself with unction.

Well, here they were gliding along down the river, just as Perk had so many times vividly pictured in his mind, with darkness all around them, and only Jethro’s intimate knowledge of the intricacies of the stream, and its various outjutting snags, standing between themselves and a cold bath.

Perk thrilled with deepest satisfaction. From this time on he felt assured all sorts of exciting happenings would be the order of the day or night; and no longer would he feel bored by inaction. The war against the desperate smuggler gang was on, and the outcome could not possibly be delayed much longer than forty-eight hours, he felt confident.

Half an hour and more had now passed since their start on the inland voyage, and several times they found the angry water foaming up around them as if eager to drag the adventurous voyagers down into its unknown depths. But always Jethro maintained a perfect grasp on the situation, parrying this rock, and that snag, as though he possessed the eyes of a cat.

It was simply amazing how he managed, and Perk found himself growing deeper and deeper wrapped up in sincere admiration for one who could display such wonderful skill, such fearless handling of a frail boat in all that turgid, leaping water.

Finally Jethro began to slow up, and the others knew from this that evidently they must be drawing close to the place for which they were aiming. Yes, several times when it happened the water was more calm, Perk felt positive he caught the faint sound of human voices, as though reckless men might be making merry with some sort of liquid refreshment that loosened their tongues, and made them feel unusually jolly.

So, too, did he glimpse signs of growing light, and figured that doubtless fires might be burning, with supper cooking. Fed up with a desire to set eyes on what lay so close by, Perk counted the minutes as the boat continued to move smoothly along.

Finally he found that Jethro was propelling it by hand, the noiseless engine having stopped its pulsations; and a minute later they lay back of a screen formed of hanging Spanish moss and clinging vines, quite as effectual so far as concealment went as the curtain hiding the airship.