Then he strolled toward the bow, to have a little chat with the lookout.
As he walked along the side of the cabin he became aware of a figure leaning over the rail, gazing far down into the sea.

By the man's general form he made the fellow out to be Walt Wingate.

The deck hand had hold of something, although what it was Sam could not tell.
At first the youngest Rover was going to call to the man and ask him what he was doing.

But he remained silent, and stepped into the shadow of the cabin as Wingate left the rail and crossed to the other side of the yacht.

From under some coils of rope the deck hand brought forth something, lifted it over the rail and dropped it gently into the sea.
Then he leaned far over the rail as before, and this lasted two or three minutes.
"He is certainly up to something out of the ordinary," thought Sam.