In spite of his precarious and uncertain position, Nat felt a keen interest as old Harley’s craft headed straight for the cave mouth. In another moment it had penetrated the dark entrance and was within the natural tunnel. There was a click and sputter of blue flame from forward and a scimitar of brilliant light slashed the curtain of gloom within. It came from the motor boat’s powerful searchlight.
“Well, at any rate, this is a novel experience,” thought Nat to himself, as, moving swiftly, the craft on which he was held prisoner still kept her headway. It was plain enough that old Harley knew the cave well, and perhaps in this lay the secret of some of his seemingly miraculous escapes from officers despatched to look for him. At such times he vanished mysteriously and did not reappear till public sentiment had died down and his case had been “fixed” by his political friends.
Suddenly Harley gave an order:
“Slow her down, Seth.”
The end of this strange journey was evidently close at hand.
CHAPTER XV.
UNDER THE EARTH.
The boat’s pace decreased and then came another sharp command:
“Stop her!”
The light flashed on a sort of platform of rock ahead of them, a natural dock in this subterranean harbor. The white rays showed numerous bales and boxes piled all about and also a rough sort of table with tin cups and dishes on it, and in one corner, blackened with smoke, was a pile of rocks apparently dedicated to use as a cooking range.