Captain Vindex was reading.

"Do I disturb you?" asked Mont politely.

"A little," replied the captain; "but I suppose you have good reason for seeking me?"

"Rather," answered our hero. "We are surrounded by savages, and in a few minutes we shall have them on board."

"Ah," said the captain, "they have got their canoes, I suppose?"

"Heaps of them."

"Then we must do something."

"Shut up the shop," said Mont.

"That is easily done," replied the captain, touching a bell, and adding: "In half a minute the trapdoor will be closed. You need not be afraid that they will break in."

"No, but to-morrow we shall want air, and you must open the door again for your pumps to work."