“Begorra, that’s quare,” cried Barney; “shure, they’re niver in the same place at all, at all. They must be thraveling around us, an’ divil a bit do I loike it! Shure, it’s a sorry place for banshees, but on me loife it may be that same!”

“Nonsense,” said Frank, sharply, “it is a common enough phenomenon, and due to the fog.”

“Right,” cried Wade. “Somewhere near us a ship is anchored and her crew are doubtless whiling away the time in games and pleasure. A peculiar condition of the atmosphere brings their voices to us.”

“Dat am berry funny,” said Pomp, in mystified tones.

“Begorra, yez are roight,” averred Barney.

But the voices presently died away, becoming fainter and fainter. Then the fog was seen to be in motion.

Gradually it lifted and the sea was seen north, south and east of them, but to the west there was a long line of coast.

A bold headland rose to view, and with a thrill of joy Wade cried:

“That is Cape Catoche. We have thoroughly explored the sunken isthmus. Our expedition has been a success. We have rendered science a mighty service, and have good reason to feel proud of it.”

CHAPTER XI.
POOLE PLAYS A NEW CARD.