[Sidenote: The custom of keeping up a perpetual fire during a king’s reign and extinguishing it at his death, might lead to a belief that his life was bound up with the fire.] A custom of maintaining a fire during a king’s reign and extinguishing it at his death, even if it did not originate in a superstition, would naturally lend itself to a superstitious interpretation. The distinction between the sign and the cause of an event is not readily grasped by a dull mind; hence the extinction of the king’s fire, from being merely a signal of his death, might come in time to be regarded as a cause of it. In other words, a vital connexion might be supposed to exist between the king and the fire, so that if the fire were put out the king would die. That a sympathetic bond of some sort united the king’s life with the fire on his hearth was apparently believed by the ancient Scythians. For their most solemn oath was by the king’s hearth, and if any man who had taken this oath forswore himself, they believed that the king would fall ill.[862] The story of Meleager,[863] whose life was said to be bound up with a brand plucked from the fire on the hearth, belongs to the same class of ideas, which will be examined at large in a later part of this work. Wherever a superstition of this sort gathered round the king’s hearth, it is obvious that he would be moved to watch over the fire with redoubled vigilance. On a certain day the Vestal Virgins at Rome used to go to the King of the Sacred Rites, the successor of the old Roman kings, and say to him, “Watchest thou, O King? Watch.”[864] The ceremony may have been a reminiscence or survival of a time when the king’s life as well as the general safety was supposed to hang on the maintenance of the fire, to the guardianship of which he would thus be impelled by the motive of self-preservation as well as of public duty. When natives of the Kei Islands in the East Indies are away on a long voyage, a sacred fire is kept up the whole time of their absence by their friends at home. Three or four young girls are appointed to feed it and watch over it day and night with a jealous care lest it should go out; its extinction would be deemed a most evil omen, for the fire is the symbol of the life of the absent ones.[865] This belief and this practice may help us to understand the corresponding beliefs and practices concerned with the maintenance of a perpetual fire at Rome. Footnote 816: