foundation."

"What is the difference between a lunatic and an insane person?"

"The original term was lunatic, in accordance with Blackstone's
definition; but in medical science the terms insanity and mental
alienation have taken its place."

"Doesn't he act peculiarly? He does not seem to know we are present.
What I cannot understand is, how he knows enough to get anything to
eat."

"That is a peculiar thing in nature. Here is a man who has, outwardly,
the appearance of an intelligent being, incapable of talking, or
uttering intelligible sounds, with memory so submerged that he doesn't,
likely, recognize his own kind, and yet has been able to find food for
at least five months, to our knowledge. It shows that, irrespective of
mind, nature has implanted some kind of an instinct of preservation in
living beings. The subject is one that has been discussed from many
standpoints, and it can never be exhausted."

The boys now went over the entire premises, carefully examining every
part. Evidences were plenty to show that the man had slept in the shed
adjoining the stable, and the shells of nuts as well as barley heads
were found around the place he had slept.

There was everything to indicate that his trials and sufferings on the
island had deranged him. Probably his was a case like many instances
known, where consciousness of self--the absolute loss of memory, had
caused disappearances, and many instances have been recorded where
intelligence finally asserted itself and brought back former
recollections.

The instinct to clothe himself was shown when they returned. The
Professor went up to him kindly and spoke. The words were repeated in
German and French, but not one word did he utter, nor did he give the
least visible sign of recognition.

During the afternoon he wandered around from place to place. The boys
were too much fascinated to turn their attention to anything. George
started out for a trip to Observation Hill, accompanied, as usual, by
Angel. The strange man was passed on the way. Without a sign he
followed. George was a little frightened, but soon recovered, as he
walked along unconcernedly.

They crawled up the steep ascent, instead of going around the gentler
ascent, and when the pole was reached, the stranger for the first time
took any interest in anything he saw. He looked up at the flag, and then
out over the sea, and as he did so, he put up his hand to shade his eyes
from the glare of the