In the cities Greeks walked mostly bareheaded, owing most likely to the more plentiful hair of southern nations, which, moreover, was cultivated by the Greeks with particular care. Travelers, hunters, and such artificers as were particularly exposed to the sun, used light coverings for their heads. The different forms of these may be classified. They were made of the skins of dogs, weasels, or cows. The hair is considered in Homer as one of the greatest signs of male beauty among the long-haired Achaioi; no less were the well-arranged locks of maidens and women praised by the tragic poets. Among the Spartans it became a sacred custom, derived from the laws of Lykurgos, to let the hair of the boy grow as soon as he reached the age of the ephebos, while up to that time it was cut short. This custom prevailed among the Spartans up to their being overpowered by the Achaic federation. Altogether the Dorian character did not admit of much attention being paid to the arrangement of the hair. Only on solemn occasions, for instance on the eve of the battle of Thermopylæ, the Spartans arranged their hair with particular care. At Athens, about the time of the Persian wars, men used to wear their hair long, tied on to the top of the head in a knot, which was fastened by a hair-pin in the form of a cicada. Of this custom, however, the monuments offer no example. Only in the pictures of two Pankratiastai, on a monument dating most likely from Roman times, we discover an analogy to this old Attic custom. After the Persian war, when the dress and manners of the Ionians had undergone a change, it became the custom to cut off the long hair of the boys on their attaining the age of epheboi, and devote it as an offering to a god, for instance, to the Delphic Apollo or some local river-god. Attic citizens, however, by no means wore their hair cropped short, like their slaves, but used to let it grow according to their own taste or the common fashion. Only dandies, as, for instance, Alkibiades, let their hair fall down to their shoulders in long locks. Philosophers also occasionally attempted to revive old customs by wearing their hair long.