"Why? Because I am under no delusion about what we have left behind. Wallion is out of the reckoning" (here the latter pinched Tom's arm), "but don't forget McTuft, who was at Toroni's heels, and Wallion's Swedish friend, too, would not be idle either; it is quite possible that he was at the Golden Snake Hotel with Wallion. William Robertson has been set at liberty ere this, and would, naturally, tell all he knows. In short," said the Doctor with bitterness, "there is no lack of witnesses who can swear that we went out on a trip whence we shall require no return tickets."

"Fudge," said Dixon again, "the ocean is large."

"Answer me one thing," interrupted the Doctor. "How is it our wireless has received no inquiries about the 'Ariadne' from either incoming or out-going vessels?"

"Oh, I don't know."

"Well, I can tell you: it is because we are being tracked, and it was probably known that same evening that we were on board her. As they don't seem to be making inquiries about the yacht, I conclude they know all about her, that very likely a patrol-boat is chasing us already; and if they have discovered our final destination they will make straight for Hurricane Island and as likely as not arrive there before us."

A mournful silence followed this speech.

"I should say you're right about that," said Dixon.

"I'll just have a talk with the captain."

He was back again in five minutes.

"Hawkins says that with this wind the 'Ariadne' can be at Hurricane Island by Wednesday evening, if I will take the risk of the boiler bursting," he said evidently greatly relieved.