Feeling perfectly secure, he soon fell asleep beside his comrade, but his slumber was uneasy; he awoke from a fearful nightmare shaking as if with fever and tossing an armful of dry wood on the dying fire, he squatted near it. Suddenly, from a tree above his head, an owl uttered its mournful cry and so frazzled were the man’s nerves that he jumped and yelled in alarm. Drowsily the red-bearded fellow opened his eyes, mumbled an oath when the other confusedly tried to explain and was soon snoring again. Ashamed of his fright at the owl, the leader threw himself down and closed his eyes, blaming his own foolishness. But though the monotonous chirping of insects and the soft gurgle of the water lulled and soothed, he found himself still straining his ears for any unusual sound and was as nervous as ever.

Once he thought he heard the sound of a cautious footstep and instantly he sprang up, cocked pistol in hand and peered anxiously into the shadows. For a brief instant he seemed to glimpse a moving, shapeless form and raising his weapon he was about to fire, but his hand shook and trembled so he could not aim. Before he could steady himself by an almost superhuman effort, there was nothing to be seen but the dark sluggishly flowing creek and the ghostly outlines of the trees.

But sleep was out of the question. For hour after hour he sat wide awake and with every sense alert until the gray dawn broke and the shadows of the night gave way to the faint morning light. Rising, he stepped towards the canoe and as he crossed the narrow strip of muddy shore between the water’s edge and the fire he halted in his tracks, staring with unbelieving eyes at the ground. Plainly visible in the oozy soil were the imprints of naked human feet!

Some one had been there in the darkness! Some one had crept about the camp, and with fears once more aroused, but with murder in his heart, the fellow cocked his pistol and hurriedly strode about the islet. But there was no sign of a human being. No boat, no mark of a canoe having been drawn ashore; only those footprints near the fire, footprints which came from nowhere and led nowhere. As far as appearances went the being who made them might have dropped from the sky and afterwards have taken flight on wings.

All of the man’s superstitions were now aroused and regardless of his companion’s possible sneers and scoffings, he shook the slumbering red-bearded fellow awake and showed him the footprints. But the burly rascal gave little heed to them, declaring they were merely footprints of some Indian and might have been there for days. Swearing vociferously that he didn’t see what there was about an Indian’s track to cause worry anyway, he vowed that he for one would be glad to run across an Indian or an Indian village in order to get food, for unless they gained the river and managed to secure provisions they would be facing starvation as there were barely two days’ rations remaining.

But even with this very real and pressing danger confronting them, the memory of the mysterious footprints were uppermost in the leader’s mind. He was brave enough in the face of real danger; as long as tangible enemies were to be met he had nerves of steel, and he had never quailed when peril threatened. But this nerve-wracking, haunting fear of an unknown, invisible something was beyond his control and somehow he could not avoid connecting the terrible wailing cry he had heard with the strange footprints on the island. And then, just before noon, the creek widened and, through the trees ahead, the broad river came into view and a great weight seemed lifted from his mind as the dismal creek was left behind.

Just below the mouth of the creek they stopped for their midday rest on a jutting, wooded point. The meal over, the red-bearded man yawned prodigiously, vowed he was going to have a nap before going farther and lighting his pipe, threw himself down in the shade of a tree. The other, all his fears flown, now they were on the big river and with the bright sunshine all about, remarked that he would wander off in the hope of finding game and filling the magazine of his pistol with cartridges, he fastened the canoe securely, and puffing contentedly at his pipe strolled up the bank into the forest.

There was little undergrowth, the huge trees, with their outjutting roots and their drapery of trailing vines and lianas, stood well apart and treading softly and glancing here and there, the man walked among the trees with pistol cocked and ready.

From the lofty branches bits of falling fruit and nuts told of birds or other creatures feeding among the leaves; the hoarse yelping of toucans sounded from the foliage; occasionally, a macaw uttered its raucous scream and unseen parrots screeched and squawked. Once too, a troop of great, red, howling monkeys crashed off through the tree tops, leaping from branch to branch and uttering hoarse barks of protest at the intruder. But no creature appeared within pistol shot and at last, thoroughly disgusted and realizing that he and his comrade were wasting valuable time and should be on their way, he turned about and started to retrace his steps towards the river.

The next moment he halted in his tracks, shaking with nameless terror. His thin-lipped cruel mouth gaped, the ever present monocle dropped unnoticed from his eye, the hand that grasped his weapon trembled, for once again that awful, blood curdling scream had echoed through the jungle.