In Chapter Four, as the boys settle into life on the island, factions develop. The smaller boys are now known by the generic title of "littluns," including Percival, the smallest boy on the island, who had previously stayed in a small shelter for two days and had only recently emerged, red-eyed and miserable. The littluns spend most of the day searching for fruit to eat, and since they choose it indiscriminately they suffer from chronic diarrhea. They cry for their mothers less often than expected, and they spend time with the older boys only during Ralph's assemblies. The littluns occupy themselves by building castles in the sand, complex structures whose fine details are only noticeable from close range. The littluns remain collectively troubled by nightmares and visions of the "beastie" described at the first meeting. They fear that the creature hunts the boys after nightfall.