the dead man's coat. "The mystery is now solved."

He held up the hair.

"Listen," he said, "we have only to find the man who lost
this hair and the criminal is in our hands."

The inexorable chain of logic was complete.

The detective set himself to the search.

For four days and nights he moved, unobserved, through
the streets of New York scanning closely every face he
passed, looking for a man who had lost a hair.

On the fifth day he discovered a man, disguised as a
tourist, his head enveloped in a steamer cap that reached
below his ears. The man was about to go on board the
_Gloritania_.

The detective followed him on board.

"Arrest him!" he said, and then drawing himself to his
full height, he brandished aloft the hair.

"This is his," said the great detective. "It proves his
guilt."

"Remove his hat," said the ship's captain sternly.