It was extremely cold, but neither minded that.
At last they reached a portion of the island that was very uneven.

Great chasms yawned to the right and left of them.

It was with difficulty that they pushed forward.
But they were bound to go on, and go they did, until at the mouth of what looked like a cave of ice the captain called a halt.
"Listen!" he whispered.

"I hear voices." Bob listened.

Captain Sumner was right.