Page:The man who knew too much.djvu/366

 painful coldness were beginning to hold more and more of their attention.

"Then there is the well itself," proceeded the doctor, with the same air of insane calm. "I suppose some of you by this time know at least the secret of that. The secret of the well is simply that it is not a well. It is purposely shaped at the top so as to look like one, but it is really a sort of chimney opening from the roof of one of those caves over there; a cave that runs inland just under the wood, and indeed is connected by tunnels and secret passages with other openings miles and miles away. It is a sort of labyrinth used by smugglers and such people for ages past. This doubtless explains many of those disappearances we have heard of. But to return to the well that is not a well, in case some of you still don't know about it. When the sea rises very high at certain seasons it fills the low cave, and even rises a little way in the funnel above, making it look more like a well than ever. The noise Mr. Paynter heard was the natural eddy of a breaker from outside, and the whole experience depended on something so elementary as the tide."

The American was startled into ordinary speech.

"The tide!" he said. "And I never even thought of it! I guess that comes of living by the Mediterranean."