“It would be quite easy to decoy the fellow outside. Especially,” Joe added, in a whisper, “after what you told me about that vial Dixon had, and his dropping some stuff in the water decanter. Why didn’t you, or why don’t you, tell Mr. Tremaine about that?”

“He’d be likely to suspect I was trying to throw suspicion on his guest to keep it off myself,” Halstead replied, shaking his head.

While this was being said, Officer Randolph, who had walked astern, was out of hearing. While they were below Tom had found chance to tell his chum, in whispers, about the incidents of the vial and the water bottle. They had even investigated the water bottle on the sideboard, but had found it empty.

So it was Captain Tom who, on the third and belated trip of the boat, went ashore. Randolph went with him, even accompanying the young sailing master to the little hotel of which Tres Arbores boasted.

In the parlor they found the passengers of the “Restless” awaiting the summons to breakfast.

“You’ll join us, Mr. Randolph, of course,” pressed Mr. Tremaine.

“Thank you; I shall be happy to sit down and drink coffee with you,” replied the Southerner.

At that moment the proprietor entered, calling them to breakfast in the next room. As the proprietor seated them, Dixon was on one side of the table, with the Tremaines, Ida Silsbee being on the opposite side, between Randolph and the young motor boat captain.

As soon as the waiter had left them, Tom looked across at Mr. Tremaine, eyeing him steadily.