On the morrow, however, as they were pursuing their aërial path along the borders of a narrow, sluggish bayou, they were suddenly made to realize that the tree-tops held perils more deadly than that of the lurking leopards. They were all staring down into the water, which swarmed with gigantic crocodiles and 225 boiled immediately beneath them with the turmoil of a life-and-death struggle between two of the brutes, when harsh jabbering in the branches just across the water made them look up.

The tree-tops opposite were full of great apes, mowing and gibbering at them with every sign of hate. The beasts were as big and massive as Hobbo himself, and covered thickly with long, blackish fur. Their faces, half human, half dog-like, were hairless and of a bright but bilious blue, with great livid red circles about the small, furious eyes. With derisive gestures they swung themselves out upon the overhanging branches, till it almost seemed as if they would hurl themselves into the water in their rage against the little knot of human beings.

The girl A-ya, overcome with loathing horror because the beasts were so hideous a caricature of man, covered her eyes with one hand. Young Mô, his fiery temper stung by their challenge, clapped an arrow to his string and raised his bow to shoot. But Grôm checked him sternly, dreading to fix any thirst of vengeance in the minds of the terrible troop.

“They can’t come at us here. Let them forget about us,” said he. “Don’t take any more notice of them at all.”

As he led the way once more through the branches along the edge of the bayou, the apes kept pace with them on the other side. But presently the bayou widened, and then swept sharply off to the west. Grôm kept on straight to the north, by the route which he had 226 planned. And the mad gibbering died away into the hot, green silence of the tree-tops.

The adventurers now pushed on with redoubled speed, unwilling to pass another night in the tree-tops when such dangerous antagonists were in the neighborhood. The hills, however, were still far off when evening came again. Not knowing that the great apes always slept at night, Grôm decided to continue the journey in order to lessen the risk of a surprise. When the moon rose, round and huge and honey-colored, over the sea of foliage, traveling through the tree-tops was almost as easy as by day, while the earth below them, with its prowling and battling monsters, was buried in inky gloom. When day broke, there were the rounded hills startlingly close ahead, as if they had crept forward to meet them in the night.

And now the hills looked different. Between the nearest––a long, rolling, treeless ridge of downland––and the edge of the jungle lay an expanse of open, grassy savannah, dotted with ponds, and here and there a curious, solitary, naked tree-trunk, with what looked like a bunch of grass on its top. They were like gigantic green paint-brushes, with yellow-gray handles, stuck up at random. Far off they saw a herd of curious beasts at pasture, and away to the left a giant bird, as tall as the tree by which it stood, seemed to keep watch. A little to the right, where the treeless ridge came abruptly to an end, gleamed a considerable stretch of water. It was toward this point, where 227 the water washed the steep-shouldered promontory, that Grôm decided to shape his course across the plain.

By the time the sun was some three hours high they had arrived within a couple of hundred yards of the open. Sick of the oppressive jungle, and eager for the change to a type of country with which they were more familiar, they were swinging on through the tree-tops at a great pace, when that savage, snarling jabber which they so dreaded was heard in the branches behind them. Grôm instantly put A-ya in the lead, while he himself dropped to the rear to meet this deadliest of perils. There was no need to urge his party to haste; but it seemed to them all as if they were standing still, so swiftly did the clamor of the apes come upon them.

“Down to earth,” ordered Grôm sharply, seeing that they must be overtaken before they could reach the open, and realizing that in the tree-tops they could not hope to match these four-handed dwellers of the trees.

As they dropped nimbly from branch to branch, the foremost of the apes arrived in sight, set up a screech of triumph, and came swooping down after them in vast, swinging leaps. In the hurry Hobbo dropped his fire-basket, which broke as it fell and scattered the precious coals. Grôm, guarding the rear of the flight, made the mistake of keeping his eye too much on the enemy, too little on where he was going. In a moment or two, he found himself cut 228 off, upon a branch from which there was no escape without a drop of twenty feet to a most uncertain foothold. Rather than risk it, he ran in upon his nearest assailant at the base of the branch, thrusting at the blue-faced beast with his spear. But his position being so insecure, his thrust lacked force and precision. The great ape caught it deftly; and Grôm, to preserve his balance, had to let the spear be wrenched from his hand. At the same moment another ape dropped on the branch behind him.