"I see how dat is," said Joe, suddenly catching an idea.

"Well, explain it to Jake, then," said Sam laughing.

"W'y, Mas' Jake, don't you see de moon's gwine to shine bright as day,
an' so dey ain't a gwine to be no dark to-night."

"That's it, Joe," replied Sam, "but if there was no moon I'd still go
on. The drift isn't in the least dangerous."

"Why not, Sam?" asked Tom.

"Well, in the first place, it wouldn't be very easy to knock a hole in
such a boat as this anyhow, and as we're only floating, we go exactly
with the drift nearest us; we go faster than the drift in by the shore
there, because we're in the strongest part of the current, but the
drift nearest us is in the same current, and moves as fast as we do,
or pretty nearly so. My paddling adds something to our speed, but not
much. I only paddle enough to keep the boat straight in the channel.
If we were to stop against the bank, and fasten the boat there, the
drift would bump us pretty badly, but it can do us no harm so long as
we float along with it."

[Illustration: SAM PLAYS THE PART OF SKIPPER.]

The moon, nearly at its full, was rising now, and very soon the river
became a picture. Running rapidly, bank full, with tall trees bending
over and throwing their shadows across it, with here and there a
fragment of a moon glade on the water, while the dense undergrowth of
the woods, lying in shadow, gave the stream a margin of inky blackness