Satisfied that there was something wrong with their fire-making, they decided to warm themselves by exercise, knowing that a good, brisk run would set the blood to tingling in their veins; but then the question arose as to the direction in which they should run, as well as a place where they might find room in which to run. The tangled undergrowth grew close around them. Nothing could run in that. They had no idea where the trail was. There was nothing left, therefore, but the trees, and so they clambered back to the lower branches and with stiff fingers and numb joints started once more in the direction they thought would lead them to the railway.

As they moved forward, they commenced to feel the reviving influence of renewed warmth and life. But as they forgot the cold, they became more conscious of their hunger and now thirst was adding to their discomfort. They heard the sounds of the smaller life of the jungle, and occasionally caught fleeting glimpses of beautifully colored birds. A small monkey came and ran along above their heads and his chattering attracted others, until soon there were many monkeys around them. They did not seem very much afraid of the boys, nor were they unfriendly. They were merely curious. And they were always eating; a fact which drove the boys nearly crazy with hunger.

They watched carefully to discover what the monkeys ate, for they knew that what the monkeys ate with safety, they might eat; but when they discovered that the bill-of-fare appeared to consist quite largely of caterpillars they changed their minds. After a while they saw one of the monkeys gather fruit from a tree and eat it with great relish and they lost no time in clambering up into the branches of that same tree and searching for more of the fruit. It did not taste very good, but it was food and stopped the gnawing pangs of hunger, and its juices helped to satisfy their thirst.

When they had eaten they continued their search for the railway and found it easier to travel through the trees though they were, as yet, far from perfect at it. The food had given them renewed hope and they were quite sure now that they would soon reach the twin bands of steel that would mean rescue, for even if their train had left, there would be other trains along, which would surely stop at sight of two white boys. They might not have felt so much confidence had they dreamed that they were travelling deeper and deeper into the forest, directly away from the railway.

Dick, who was in the lead, suddenly voiced an exclamation of satisfaction and relief.

"Here's the old trail!" he cried. "Now we can make some time."

"Gee, but it's good to get your old feet on the ground again," said Doc as the two boys stood again on solid footing. "Come on! Now let's beat it."

With brisk steps they set off along the game trail that ran in the same general direction they had been travelling, positive now that they were on the right road. Doc, his spirits rising to the occasion, broke into a gay whistle.

Ahead of them Zopinga came to an abrupt halt. For an instant he stood, listening intently, then he dropped to his hands and knees and placed his ear against the ground and remained there for a moment, motionless.

When he arose, he still remained in a listening attitude, straining every faculty to interpret the sounds that were approaching him along the trail. Just before the boys came into sight the savage warrior stepped into the green wall of the jungle trail. The leaves and branches dropped back, forming an impenetrable screen behind which Zopinga waited.