As the conversation continued John became more and more thoughtful and silent. Several times he had been startled by sounds which he had heard in the room directly above that in which they were assembled. Twice he suspected that some one had come to the head of the rude little stairway and was listening to the sounds of conversation below.

On each occasion it had seemed to him that he had heard the sound of a rustle of a woman’s dress. But of all this he could not be certain and even if his surmise had been correct he had no reason to be more suspicious of their host.

Indeed his suspicions might not have been aroused had not he intercepted a look which the man gave his Japanese servant, which caused the latter quickly to go to the head of the stairway.

John was deeply interested and striving to appear indifferent watched keenly the face of the Japanese when the latter returned to the room and was positive that he saw the little, brown man shake his head slightly in response to a question in the eyes of his employer.

Such actions might be entirely natural, and John tried to assure himself that there was no cause for his increasing suspicions that something was not right in the strange house on the shores of Cockburn Island.

He had no opportunity to explain his suspicions to Fred, however, for just then the sailor said, “It is time for us to go back and keep a lookout for the Gadabout.”

Acting at once upon his suggestions the two boys arose from their seats.

Cordially thanking their host for his kindness in receiving them into his house and providing for their wants, they soon departed, following the mate as he led the way to one of the higher bluffs along the shore.

“I don’t know that man’s name yet,” said John to Fred.

“That’s so,” acknowledged Fred. “We don’t know who he is, do we? Well, it’s as broad as it is long, for he doesn’t know our names either.”