"Before I was a trader," said he, "I was a hunter of big game."

It was then that Braid awakened Harry and told him the news. The boy was heartily glad to see the guide, whom he had certainly believed to be dead.

"And your brother?" he asked.

"My brother is safe," said the man. "You did wisely to remain here. You could never have got back to Calabar. The country swarms with German troops."

"Then what are we to do?" asked Harry.

"Go north," said Fernando. "Go north at every risk, to Maziriland. My brother has already struck out across the mountains. He and I know of a place where they will never find us. I have come here to take you there. Cortes awaits us. We must start at once. There is no time to lose."

[CHAPTER XIII—The Black Dog]

After they had explained to Fernando how it had come about that Peter Klein had joined their party, they set forward in a northerly direction, guided by the half-caste. They passed through the forest and crossed a wide valley. Thence they traversed a great ridge of hills, at the end of which they came to a mountain-top. This they began to ascend. There were many places so steep and stony that they were often obliged to go on all fours, and Klein, who was both weak and nervous, stood in constant danger of his life.

Finally they gained the summit. The top of the mountain was shaped like a bowl. It was evidently the crater of an extinct volcano. In one place an enormous rock had a cleft in it like a sword-cut, and through this Fernando led them. The cleft was so narrow that they were obliged to walk sideways, like crabs. After a time the passage opened, and they found themselves in a small arena in the centre of which a spring of water bubbled to the surface. After the heat of the forest the air was delightfully refreshing and cool.

When they had drunk their fill the guide took them to a place where a boulder as round as a football and about five times the size, lay upon the ground. This he rolled away, not without difficulty, and underneath it was a hole about three feet across, like one of those "blowholes" which can be seen in some of the caves of Cornwall or South Wales.