At first, the home of all was in the caves dug in the soft rock of the ledge, for of those who came to the novel refuge there was, for a season, none who could sleep in the bright light from the never-waning flames. There came a time, though, when, in midsummer, Ab grumbled at the heat within his cave and he and Lightfoot built for themselves an outside refuge, made of a bark-covered "lean-to" of long branches propped against the rock. Thus was the first house made. The habitation proved so comfortable that others in the valley imitated it and soon there was a hive of similar huts along the foot of the overhanging precipice. When the short, sharp winter came, all did not seek their caves again, but the huts were made warmer by the addition to their walls of bark and skins, and cave dwelling in the valley was finally abandoned. There was one exception. Old Mok would not leave his warm retreat, and, as long as he lived, his rock burrow was his home. There came also, as recruits, young men, friends of the young men of the valley, and the band waxed and waned, for nothing could at once change the roving and independent habits of the cave men. But there came children to the mothers, the broad Moonface being especially to the fore in this regard, and a fine group of youngsters played and straggled up and down the creek and fought valiantly together, as cave children should. The heads of families were friendly, though independent. Usually they lived each without any reference to anyone else, but when a great hunt was on, or any emergency called, the band came together and fought, for the time, under Ab's tacitly admitted leadership. And the young men brought wives from the country round. The area of improvement widened. Around the Fire Village the zone of safety spread. The roar of the great cave tiger was less often heard within miles of the flaming torches of the valley so inhabited. There grew into existence something almost like a system of traffic, for, from distant parts, hitherto unknown, came other cave men, bringing skins, or flints, or tusks for carving, which they were eager to exchange for the new weapon and for instruction in its uses. Ab was the first chieftain, the first to draw about him a clan of followers. The cave men were taking their first lesson in a slight, half unconfessed obedience, that first essential of community life where there is yet no law, not even the unwritten law of custom.