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.