Of the two, Samba and the crocodile, it was the saurian that first recovered his wits. His instinct when disturbed at close quarters is to rush forthwith upon his enemy or victim. Thus did the crocodile now. Considering that he is a beast not built for jumping, the leap he attempted, with a spasmodic wriggle of his formidable tail, was quite a creditable feat. With his teeth he grazed the lower part of the branch on which Samba sat; and the boy, gazing down into the beast's eyes, shuddered and shrank away. Fortunate it was for him that his legs had not been dangling. Nothing could then have saved him.
The reptile, slipping back after its failure, maintained its hold on the lower branches with its forefeet. Before it could make a second attempt, Samba had swung himself into the branch above. The tree toppled slightly, and for one moment of terror Samba feared he would be thrown into the very jaws of the monster. But the sandbank held the tree firmly, and that peril was past.
With thick foliage between it and the boy, the crocodile saw no chance of securing its victim from its present position. But it was determined not to be balked, and, cunning beast! could afford to wait. It seemed to know that the boy was only safe so long as he clung to his perch. On the sandbank, or in the water, his end would alike be speedy. So the reptile slid off the bank into the water, and swam to the trunk end of the tree, which had been swung round by the current and was now pointing down stream. If it could not leap, it could crawl, and up the trunk the approach to its prey was easy.
Samba's eyes were now wide with fright, as he saw the beast's intention. Up a tree on the river bank he could have laughed any crocodile to scorn; but this sandbank in midstream was ground peculiarly the creature's own, even though the prey was on a branch ten feet above it. With its experience of sandbanks the crocodile knew there was no permanency in this arrangement.
The attempts of the huge reptile to gain a footing on the trunk had a result which caused Samba mingled hope and fear. The tree floated clear of the bank, and the voyage began again. But how different were the circumstances! In the stern, no longer a cheerful smiling boy, carelessly watching the slow banks glide by, but a boy whose hands and feet gripped his perch with anxious tenacity, and whose scared eyes were quick to mark every movement of the unwelcome, the abhorred, passenger amidships. With many a splash of its tail, and many a grunt of impatient fury, the monster at last made good its footing on the broad trunk, which under its weight was for more than a quarter of its length invisible beneath the surface of the water. For some minutes it lay still, staring at Samba with unwinking eyes, displaying all its teeth as if to grin sardonically at its victim. Samba regretted for the moment that he had not swarmed down from his perch and attacked the crocodile with his knife while he was still struggling to mount the trunk. But then he reflected that he had after all done wisely, for the reptile would have slid back into the water, and before Samba could gain his retreat, he might have been swept off by one swish of the terrible tail.
Samba, as he had shown more than once, and notably in the recent incident of the serval, had no lack of courage; but he had never before been at such close quarters with a crocodile, the most terrible of all the natural enemies of man in the regions of the Congo. And as he sat and watched the glassy stare of the hideous reptile now wriggling inch by inch towards him, he felt a strange helplessness, a kind of fascination that seemed to chill and paralyse his power of movement as of thought. He had retreated as far as he dared. His weight had caused some of the slenderer and more elastic branches to bend towards the water; he had even imagined that, as he tested them, the pressure threatened to make the tree revolve. What his fate would be if the whirling of the trunk on its axis brought him into the river he well knew. The crocodile would slip as nimbly as an eel after him; and, entangled in the foliage, which to his armoured enemy would offer no obstacle, he would fall an easy prey.
The crocodile wriggled on, till it came to the place where the first branch forked from the trunk. Scarcely more than its own length now separated it from Samba. Apparently it had come as near as it cared to venture; not being a climber, the feat of crawling up the tapering branch on which Samba was perched was not one to its taste. It lay still, with jaws agape, its eyes half-closed in a kind of wicked leer.
Samba tried to look away from the hideous beast, but in vain; he found his gaze drawn back uncontrollably. He felt even more subject to the fascination now that the crocodile's movements had ceased. The conviction was growing upon him that sooner or later he would slide down the branch and fall dreamily into the open jaws. He was fast becoming hypnotized.
But he was roused from this dangerous trancelike state by a sudden roll of the tree. Perched high as he was, the motion caused him to swing through an arc of several yards and brought him perilously near the water. The danger quickened his faculties: he clung on with a tighter grip, bethinking himself to look whether his fishing spear, which he had stuck into the bark, was still safe. He was relieved to find that it was undisturbed. The tree righted itself, and a gleam of hope lightened Samba's mind when he saw that the crocodile was in the water. Though, stretched on the trunk, the beast had felt the roll less than Samba above, it had a less tenacious grip and less ability to adapt itself; and first the tail, then the rest of its body had slid off. It was violently struggling to regain its position, its jaw resting on the trunk, its forepaws furiously beating the water.
The memory of the reptile's former difficulties in mounting inspired Samba with an idea, which, impelled equally by terror and hate, he was prompt to act upon. The tree was still rocking slightly before regaining its steadiness, and the crocodile, despite its efforts, was unable to gain a firm grip on the moving trunk. All its attention was engaged upon the accomplishment of its immediate purpose: it would lose the dainty morsel if it did not once more mount the tree. Samba was quick to seize the critical moment. Spear in hand he crept downwards along the branch on which he had been perched, careful that his movements should not divert the crocodile's attention. Reaching the junction of the branch with the parent stem, only five or six feet from the reptile, he let himself down noiselessly into the river on the far side of the tree, and swam for a second or two until he came opposite the crocodile. During these few seconds he had been hidden from the creature's view by the mass of the trunk, which rose out of the water to some height above his head.