But beyond the expanse of jungle stretched another line of hills, their summits not saw-toothed like his own, but low and gently rounded, and of a smoky purple against the pure turquoise sky. These hills Grôm was thirsting to explore. They might contain caves more roomy than those of his own hills––spacious and suitable to give shelter to his tribe, which was now finding itself somewhat cramped. Moreover, it had always seemed to Grôm that there might be a mystery behind 220 those hills, and to his restless imagination a mystery was always like a stinging goad.
In all this neighborhood the crust of earth was thin as plainly appeared from the fringe of wavering volcanic flames which, during all the five years since the coming of the tribe, had been dancing from the lip of the narrow fissure across the mouth of their valley. Night and day, now high and vehement, now low and faint, they had danced there, guarding the valley entrance––until just one moon ago. Then had come an earthquake, shaking the hearts of all the tribe to water. The dancing flames had died. The fissure had closed up, and its place had been taken by a pool of boiling pitch. And one of the caves had fallen in, burying several members of the tribe, who had been too stupefied with panic to flee into the open at the first alarm. For some days after this catastrophe the tribe had camped in the open, huddled about their great fires. Then, but with deep misgivings, they had all crowded back into the remaining caves.
But now there was not room enough, and Bawr, the wise Chief, had taken frequent counsel upon the matter with Grôm, whom, loving him greatly he called sometimes his Right Hand and sometimes the Eye of the People. At last, it had been settled that Grôm should lead a party through the jungle land to those other hills, to spy out the prospect. And Grôm, like the foresighted leader that he was, had spent many hours on the mountain-top, planning his route and studying the luxuriant surface of the jungle outstretched 221 below him, before plunging into its mysterious depths.
As was his custom when on a perilous venture, Grôm would have few followers to share the peril with him. He took A-ya, not only because of her oft-proved courage and resourcefulness, not only because he wanted her always at his side, but, above all, because he knew he could not leave her behind. Had he tried to leave her, she would have disobeyed and followed him by stealth––and perhaps fallen a prey to prowling beasts. He took also A-ya’s young brother, the hot-head Mô; and Loob, the shaggy, little sharp-faced scout, who could run like a hare, hide like a fox, and fight like a cornered weasel. This he would have accounted, ordinarily, a sufficient party. But the present enterprise being one of peculiar difficulty, he decided at the last moment to strengthen his following by the addition of a dark-faced, perpetually-grinning giant named Hobbo, who was slow of wit, but thewed like a bull, and a mighty fighter with the stone-headed club.
This little but greatly daring band, which Grôm, one flaming sunrise, led down into the unknown jungle, was well armed. Besides the spear and the club, each member of the party but Hobbo (who had displayed no aptitude for its use) carried Grôm’s wonderful invention––the bow. Hobbo, however, because of his immense strength, bore the heavy fire-basket, wherein the smoldering coals were cherished in a bed of clay. As a food reserve, everyone carried a few strips of 222 half-dried meat; but their main dependence, of course, was to be upon the spoils of their hunting and the fruits that they might gather on their march.
The forest into whose depths Grôm now led the way was in reality a survival from a previous age, into which the forms, both vegetable and animal, of contemporary life had been gradually infiltrating. The soil, of incredible fertility, still poured forth those gigantic tree grasses, and colossal, sappy ferns and psuedo-palms, which had flourished chiefly in the carboniferous period. But here they were mingled with the more enduring hard-wood growths of the later tropical forests; and only these were strong enough to support the massive, strangling coils of the cable-like lianas, which wound their way up the huge trunks and reached out in aërial, swaying bridges from tree-top to tree-top. On every side, high or low, the deep-green gloom was splashed with color from the gorgeous orchids and other epiphytes, which flowered out into grotesque or monstrous wing-petaled shapes of vermilion and purple and orange and rose and white, eyed with velvet black or streaked with iridescent bronze.
To men of to-day this jungle would have been impenetrable, except by the incessant use of axe or machete. But Grôm and his party were Cave-Men, and had not yet forgotten all the instincts and capacities of their tree-dwelling ancestors. Sometimes, where it seemed easiest, they forced their way along the ground, or followed the trodden trail of some great 223 jungle beast, so long as it led in the right direction. But here they had to be ceaselessly on the watch against surprise by creatures whose monstrous tracks were unlike any that they had ever seen before. Whenever possible, therefore, they preferred to journey, after the fashion of their apish ancestors, by way of the high branches and the liana bridges. Hampered as they were by their weapons, their progress by this aërial way was slow. But it was comparatively secure. And it was also comparatively cool; while down at the ground-level the steaming heat and the stinging insects were almost beyond endurance.
Yet before the end of that first day’s journey they learned that even in tree-tops it was necessary to be always on the watch. Once the little hairy scout, Loob, who traveled always on the outskirts of the party, was struck at suddenly by a huge black leopard, which lay ambushed in the crotch of a tree. Loob, however, who was so quick-sighted that he seemed to see things before they actually happened, leapt to a higher branch in time to escape the deadly paw. In the next instant he struck down furiously with his spear, catching his assailant between the shoulder-blades and driving the stroke home with all his strength. With a screech, the beast stiffened out, and then, somewhat slowly, collapsed. As Loob wrenched his weapon free, the great animal slumped limply from its branch. For a moment or two it hung by the fore-paws, coughing and frothing at the mouth. Then this last hold relaxed and it fell, bumping with a curious deliberation 224 from branch to branch. It vanished through a floor of thick leafage, and struck the ground with a dull crash. It must have fallen under the very jaws of an unseen waiting monster; for there arose at once a strange, hooting roar, followed by the sound of rending flesh and cracking bone. Loob grinned over his feat, and Grôm, glancing at A-ya, muttered quietly: “It is better to be up here than down there.” As he spoke, and they all peered downwards, a dreadful head, with the limp body of the leopard gripped like a rat between its long jaws and dripping yellow fang, thrust itself up through the floor of leafage and stared at them with round eyes as cold and black as ice.
Grôm itched to shoot an arrow into one of those unwinking, devilish eyes. But arrows were too precious to be wasted.
That night they slept profoundly on a platform which they wove of branches in one of the tallest and most unscalable trees. They kept watch, of course, turn and turn about; but nothing attempted to approach them, and they cared little for the sounds of strife, the crashings of pursuit and desperate flight, which came up to them at intervals from the blackness far below.