spered Mr. Grey from the other end. "The boat is
still there, but not a man has dipped an oar."

"They will soon," returned Sweetwater as a smothered sound of clanking
iron reached his ears from the hollow spaces before him. "Duck your
head, sir; I'm going to row in under this portion of the house."

Mr. Grey would have protested and with very good reason. There was
scarcely a space of three feet between them and the boards overhead.
But Sweetwater had so immediately suited action to word that he had no
choice.

They were now in utter darkness, and Mr. Grey's thoughts must have been
peculiar as he crouched over the stern, hardly knowing what to expect or
whether this sudden launch into darkness was for the purpose of flight
or pursuit. But enlightenment came soon. The sound of a man's tread in
the building above was every moment becoming more perceptible, and while
wondering, possibly, at his position, Mr. Grey naturally turned his head
as nearly as he could in the direction of these sounds, and was staring
with blank eyes into the darkness, when Sweetwater, leaning toward him,
whispered:

"Look up! There's a trap. In a minute he'll open it. Mark him, but don't
breathe a word, and I'll get you out of this all right."

Mr. Grey attempted some answer, but it was lost in the prolonged creak
of slowly-moving hinges somewhere over their heads. Spaces, which had
looked dark, suddenly looked darker; hearing was satisfied, but not
the eye. A man's breath panting with exertion testified to a near-by
presence; but that man was working without a light in a room with
shuttered windows, and Mr. Grey probably felt that he knew very little
more than before, when suddenly, most unexpectedly, to him at least, a
face started out of that overhead darkness; a face so white, with every
feature made so startlingly distinct by the strong light Sweetwater had
thrown upon it, that it seemed the only thing in the world to the two
men beneath. In another moment it had vanished, or rather the light
which had revealed it.

"What's that? Are you there?" came down from above in hoarse and none
too encouraging tones.

There was none to answer; Sweetwater, with a quick pull on the oars, had
already shot the boat out of its dangerous harbor.

XX. MOONLIGHT--AND A CLUE

"Are you satisfied? Have you got what you wanted?" asked Sweetwater,
when they were well away from the shore and the voice they had heard
calling at intervals from the ch