“She may belong to the company of that rascal Daego,” he told himself. “I doubt it, though. Her face was too honest and frank for that. I wonder who she may be, and if she will return.”

He wondered if their camp had been destroyed by their enemies, and thought of Daego’s black boats which Hardgrave had spoken of, and the trouble Daego was in which made him want to move back across the river. He wondered if the trouble was in any way connected with the black boats. He even gave a passing thought to Rip, the burro, who under Pant’s care had learned to prick up his ears with an air of importance and had actually taken on a little flesh.

“Didn’t bring any feed for him,” he thought. “Pant will have to hunt out one of those bread-nut trees and gather some grass from it. Be an interesting experience, mowing grass from the top of the forest. Like cutting a giant’s hair,” he chuckled.

So they moved on up the river. Past the last banana plantation and cocoanut grove, through thin settlements of bushmen, between groves of cohune-nut trees, and on and on, up and up until night fell and the stars came out.

Coming to the mouth of a small stream, they decided to camp for the night. Boats were tied to overhanging mangrove branches, dry wood was gathered and soon fires gleamed out brightly. Mingled with the crackle of the blaze was the merry talk and laughter of these ever cheerful people.

While supper was being prepared, Pant shoved a dug-out from the deck of his power boat and went paddling away up the small stream. He was going on a little trip of exploration all his own. Not that he expected to find anything of real interest. It was too dark for that. He wanted to be alone for a time, and besides, there is a real thrill to be had from poking the nose of your canoe straight away in the night up a stream you have never seen.

As he moved slowly forward into the dark, the silent mystery of the night was now and then broken by the splash of an alligator as he took to the water. Nothing was to be feared from these so long as his canoe remained in upright position.

On and on he glided. The light of cooking fires faded. Laughter died away. Still he glided on. Then, of a sudden, he became conscious of a new sound—a throbbing that, beating faintly against his eardrums, seemed to come from nowhere. At first he thought it was the beating of his own heart and wondered at his increased power to hear in that silence. Soon enough he knew it was not that.

“But what is it?” he asked himself as he held his dripping paddle in mid-air to listen.

Getting no satisfactory answer, he drove his paddle into the water and sent his boat forward at renewed speed. This lasted for ten minutes. Perspiration ran down his cheeks as he paused to listen.