sun. This was the only human thing which was
noticed about him.

When George left, he followed, walking erect, and he could not help
admiring his strong, although drawn, features, and the admirable build
of his frame. He would be an antagonist to fear as an enemy.

On the return, George stated the occurrence, and the Professor said that
the man was no doubt used to the sea, as his walk betrayed that, and the
incident of shading his eyes is a common one to all seafaring men.

But now came up the great question of the future course to be followed.
What should be done? The determination to again attempt further
explorations was fixed in the minds of all; but how should it be
conducted? Should they again brave the dangers of the sea, or make the
next trip by land?

The only means available by sea would be the partially damaged boat,
which was seventy-five miles away, and plans were considered either to
bring it to the Cataract by boat, or to repair it where it lay; either
course had its disadvantages.

One day the stranger wandered over to the workshop where Harry was
engaged. He had never been inquisitive, as nothing seemed to interest or
appeal to him. When he saw the machinery, the lathe, and, finally, the
electric battery, he stood still and gazed. Slowly he made his way to
the battery which had the terminal wires lying loose. He picked them up,
and brought the ends together, and the spark seemed to fascinate him.
The experiment was repeated several times, but the wires were soon
dropped, and he resumed his usual demeanor.

Harry ran over to the laboratory, and informed the Professor, who came
at once, and arrived just as he was dropping the wires.

"The best thing for him is something to do. In this way, the association
with tools, if he has any knowledge of them, may awaken some
recollections of his past. I have watched him for the past three days
and I am sure he is not deranged, in the sense of being demented. Let us
try what employment will do."

Harry was engaged in dressing a board with a plane when the man came in.
The Professor led him to the bench and placed a plane in his hand, and
by making a motion with his hand and pushing the man's hand along with
the plane, he took notice of the motion and mechanically drew the plane
back and forth.

He not only planed the board, but he followed up the roughened parts and
finished the job in a workmanlike manner. The saw was placed in his
hands, and he handled