There were female Suns as well as male Suns, but they might not marry among themselves; they had always to mate with a woman or a man of lower rank. Their nobility was transmitted in the maternal line; that is, the children of a female Sun, both sons and daughters, were Suns, but the children of a male Sun were not. Hence a chief was never succeeded by his own son, but always by the son either of his sister or of his nearest female relation. The Natchez knew how to produce fire by means of the fire-drill; but if the sacred fire in the temple went out, they relit it, not by the friction of wood, but by a brand brought from another temple or from a tree which had been ignited by lightning.[853] In these customs of the Natchez we have clearly fire-worship and sun-worship of the same general type which meets us again at a higher state of evolution among the Incas of Peru. Both sets of customs probably sprang originally from the perpetual fire on the chief’s domestic hearth. [Sidenote: Fire carried before chiefs and kings as a symbol of royalty.] When a perpetual fire has thus become a symbol of royalty, it is natural that it should be carried before the king or chief on the march. Among the Indians of the Mississippi a lighted torch used to be borne in front of a chief, and no commoner would dare to walk between a chief and his torch-bearer.[854] A sacred fire, supposed to have descended from heaven, was carried in a brazier before the Persian kings,[855] and the custom was adopted as a badge of imperial dignity by later Roman emperors.[856] The practice appears to have been especially observed in time of war. Amongst the Ovambo of South Africa the chief appoints a general to lead the army to battle, and next to the general the greatest officer is he who carries a fire-brand at the head of the warriors. If the fire goes out on the march, it is an evil omen and the army beats a retreat.[857] When the king of Monomotapa, or Benomotapa, was at war, a sacred fire was kept burning perpetually in a hut near his tent.[858] In old days it is said that the king of Mombasa in East Africa could put an army of eighty thousand men in the field. On the march his guards were preceded by men carrying fire.[859] High above the tent of Alexander the Great hung a fiery cresset on a pole, and “the flame of it was seen by night, and the smoke by day.”[860] When a Spartan king was about to lead an army abroad he first sacrificed at home to Zeus the Leader. Then a man called the fire-bearer took fire from the altar and marched with it at the head of the troops to the frontier. There the king again sacrificed to Zeus and Athena, and if the omens were favourable, he crossed the border, preceded by the fire from the sacrifices, which thenceforth led the way and might not be quenched. To perform such sacrifices the king always rose very early in the morning, while it was still dark, in order to get the ear of the god before the enemy could forestall him.[861]