While Ab had been occupied by home affairs trouble for him and his people had been brewing. By no means unknown to each other before the tiger hunt were Ab and Boarface. They had hunted together and once Boarface, with half a dozen companions, had visited the Fire Valley and had noted its many attractions and advantages. Now Boarface had gone away angry and muttering, and he was not a man to be thought of lightly. His rage over the memory of Ab's trophy did not decrease with the return to his own region. Why should this cave man of the West have sole possession of that valley, which was warm and green throughout the winter and where the wild beasts could not enter? Why had he, this Ab, been allowed to go away with all the tiger's skin? Brooding enlarged into resolve and Boarface gathered together his relations and adherents. "Let us go and take the Fire Valley of Ab," he said to them, and, gradually, though objections were made to the undertaking of an enterprise so fraught with danger, the listeners were persuaded.
"There are other fires far down the river," said one old man. "Let us go there, if it is fire we most need, and so we will not disturb nor anger Ab, who has lived in his valley for many years. Why battle with Ab and all his people?"
But Boarface laughed aloud: "There are many other earth fires," he said. "I know them well, but there is no other fire which chances to make a flaming fence about a valley close to the great rocks, and which has water within the space it surrounds and which makes a wall against all the wild beasts. We will fight and win the valley of Ab."
And so they were led into the venture. They sought, too, the aid of the Shell People in this raid, but were not successful. The Shell People were not unfriendly to those of the Fire Valley, and had not Ab been really the one to kill the tiger? Besides, it was not wise for the waterside dwellers to engage in any controversy between the forest factions, for the hill people had memories and heavy axes. A few of the younger and more adventurous joined the force of Boarface, but the alliance had no tribal sanction. Still, the force of the swarthy leader of the Eastern cave men was by no means insignificant. It contained good fighting men, and, when runners had gone far and wide in the Eastern country, there were gathered nearly ten score of hunters who could throw the spear or wield the ax and who were not fearful of their lives. The band led by Boarface started for the Fire Country, intending to surprise the people in the valley. They moved swiftly, but not so swiftly as a fleet young man from the Shell People who preceded them. He was sent by the elders a day before the time fixed for the assault, and so Ab learned all about the intended raid. Then went forth runners from the valley; then the matron Lightfoot's eyes became fiery, since Ab was threatened; then old Hilltop looked carefully over his spears, and poised thoughtfully his great stone ax; then Moonface smote her children and gathered together certain weapons, and then Old Mok went into his cave and stayed there, working at none knew what.
They came from all about, the Western cave men, for never in the valley had food or shelter been refused to any and the Eastern cave men were not loved. Many a quarrel over game had taken place between the raging hunters of the different tribes, and many a bloody single-handed encounter had come in the depths of the forest. The band was not a large one, the Eastern men being far more numerous, but the outlook was not as fine as it might be for the advancing Boarface. The force assembled inside the valley was, in point of numbers, but little more than half his own, but it was entrenched and well-armed, and there were those among the defenders whom it was not well to meet in fight. But Boarface was confident and was not dismayed when his force crept into the open only to find the ordinary valley entrance barred and all preparations made for giving him a welcome of the warmer sort. There was what could not be thoroughly barricaded in so brief a time, the entrance where the brook issued at the west. This pass must be forced, for the straight, uprising wall between the flames and across the opening to the north was something relatively unassailable. It was too narrow and too high and sheer and there were too many holes in the wall through which could be sent those piercing arrows which the Western cave men knew how to use so well. The battle must be up along the bed of the little creek. The water was low at this season, so low that a man might wade easily anywhere, and there had been erected only a slight barrier, enough to keep wild beasts away, for Ab had never thought of invasion by human beings. The creek tumbled downward, through passages, between straight-sided, ruggedly built stone heaps, with spaces between wide enough to admit a man, but not any great beast of prey. There was no place where, by a man, the wall could not easily be mounted and, above, there was no really good place of vantage for the defenders.
So the invading force, concealment of action being no longer necessary, ranged themselves along the banks of the creek to the west of the valley and prepared for a rush. They had certain chances in their favor. They were strong men, who knew how to use their weapons well, and they were in numbers almost as two to one. Meanwhile, inside the valley, where the approach and plans of the enemy had been seen and understood, there had gone on swiftly, under Ab's stern direction, such preparation for the fray as seemed most adequate with the means at hand.
The great advantage possessed was that the defenders, on firm footing themselves, could meet men climbing, and so, a little further up the creek than the beast-opposing wall, had been thrown up what was little more than a rude platform of rock, wide and with a broad expanse of top, on which all the valley's force might cluster in an emergency. Upon this the people were to gather, defending the first pass, if they could, by flights of spears and arrows and here, at the end, to win or lose. This was the general preparation for the onslaught, but there had been precautions taken more personal and more involving the course of the most important of the people of the valley.
At the left of the gorge, where must come the invaders, the rock rose sheerly and at one place extended outward a shelf, high up, but reached easily from the Fire Valley side. There were consultations between Ab and the angry and anxious and almost tearful Lightfoot. That charming lady, now easily the best archer of the tribe, had developed at once into a fighting creature and now demanded that her place be assigned to her. With her own bow, and with arrows in quantity, it was decided that she should occupy the ledge and do all she could. Upon the ledge was comparative safety in the fray, and Ab directed that she should go there. Old Hilltop said but little. It was understood, almost as a matter of course, that he would be upon the barrier and there face, with Ab, the greatest issue. The old man was by no means unsatisfactory to look upon as he moved silently about and got ready the weapons he might have to use. Gaunt, strong-muscled and resolute, he was worthy of admiration. Ever following him with her eyes, when not engaged in the chastisement of one of her swart brood, was Moonface, for Moonface had long since learned to regard her grizzled lord with love as well as much respect.
There were other good fighting men and other women beside these mentioned who would do their best, but these few were the dominant figures. Meanwhile, Boarface and his strong band had decided upon their plan of attack and would soon rush up the bed of the shallow stream with all the bravery and ferocity of those who were accustomed to face death lightly and to seize that which they wanted.
The invaders came clambering up the creek's course, openly and with menacing and defiant shouts, for any concealment was now out of the question. They had but few bows and could, under the conditions, send no arrow flight which would be of avail, but they had thews and sinews and spears and axes. As they came with such rush as men might make up a tumbling waterway with slipping pebbles beneath the feet and forced themselves one by one between the heaped stone piles and fairly in front of the barrier there was a discharge of arrows and more than one man, impaled by a stone-headed shaft, fell, to dabble feebly in the water, and did not rise again. But there came a time in the fight when the bow must be abandoned.