“Now we will separate and search for caves. This spot where we now are, will be our meeting-place. If anyone finds anything like a cave or a hole where the earth and rocks have fallen in, he must shout and hulloa to the rest of us. If we find nothing we will all gather here in about an hour’s time—Everybody understand?”

Then we all went off our different ways.

Each of us, you may be sure, was anxious to be the one to make a discovery. And never was a mountain searched so thoroughly. But alas! nothing could we find that looked in the least like a fallen-in cave. There were plenty of places where rocks had tumbled down to the foot of the slopes; but none of these appeared as though caves or passages could possibly lie behind them.

One by one, tired and disappointed, we straggled back to the meeting-place. The Doctor seemed gloomy and impatient but by no means inclined to give up.

“Jip,” he said, “couldn’t you smell anything like an Indian anywhere?”

“No,” said Jip. “I sniffed at every crack on the mountainside. But I am afraid my nose will be of no use to you here, Doctor. The trouble is, the whole air is so saturated with the smell of spider-monkeys that it drowns every other scent—And besides, it’s too cold and dry for good smelling.”

“It is certainly that,” said the Doctor—“and getting colder all the time. I’m afraid the island is still drifting to the southward. Let’s hope it stops before long, or we won’t be able to get even nuts and fruit to eat—everything in the island will perish—Chee-Chee, what luck did you have?”

“None, Doctor. I climbed to every peak and pinnacle I could see. I searched every hollow and cleft. But not one place could I find where men might be hidden.”

“And Polynesia,” asked the Doctor, “did you see nothing that might put us on the right track?”

“Not a thing, Doctor—But I have a plan.”