ynn. You and
Burton may have a hard time of it if Hogan and Wynn are together. I
can't tell you what to do, except to be careful and do the best you
can. There'll be no dinghy for Wynn and Hogan to use, and I think you
ought to have some success if you use your wits as well as your fists."

"If we get a chance, Clancy," answered Hill, "we'll either make good or
know the reason why."

"All right, Katz," called the motor wizard softly. "Make as little noise
as possible. If we can't get aboard the _Sylvia_ without any one knowing
it, we won't be able to get aboard at all."

"I sabe the burro, fast enough," answered Katz.

The fellow proved a good oarsman and there was scarcely a sound as he
dropped and lifted the oars. As they picked their way through the fleet
of harbor craft, coming closer and closer to the lights for which they
had headed, they found out that they had located the _Sylvia_ correctly.
Her white, trim bulwarks suddenly loomed up like a ghost ship.

No one was on deck to hail the dinghy, and Katz brought the small boat
to a stop under the _Sylvia's_ side, and at the foot of a short ladder
that was lashed to the rail.

Clancy laid hold of the ladder, and, with little noise, gained the deck.
Some one started out from the shadow of a deck awning and stepped toward
him.

"Is that you, Lewis?" the man asked.

Clancy's response was quick and to the point: With a tigerlike leap he
gained the man's side and pressed both hands about his throat.

CHAPTER XI.

ABOARD THE "SYLVIA."

Clancy's shoulder received a hard wrench and a tingling pain shot
through his arm. The man who had hailed him was of medium height and
stocky build, and well muscled. Clancy was in no physical condition to
keep up his end in such a set-to, and the result would probably have
been disastrous had not Katz leaped over the side and taken a hand.

Katz, remembering the way his pal had treated him was as venomous as a
rattlesnake. The motor wizard had all he could do to keep him from going
too far, and seriously injuring the man. With very little commotion the
fellow was overcome, gagged with a handkerchief, and tied with a rope
which Clancy picked up on the deck.

This rough work finished, the two intruders stood breathlessly in the
shadow of the awning, and waited and listened. They could hear a drone
of voices forward. The monotonous sound kept going without a break,
which seemed to prove that the slight noise aft had not been