[Sidenote: The legends of the deaths of Roman kings point to a close connexion between the king and the thunder-god.] In this connexion it deserves to be noted that, according to the legend, Salmoneus, like his Alban counterpart, was killed by a thunderbolt; and that one of the Roman kings, Tullus Hostilius, is reported to have met with the same end in an attempt to draw down Jupiter in the form of lightning from the sky.[583] Aeneas himself, the legendary ancestor both of the Alban and the Roman kings, vanished from the world in a violent thunderstorm, and was afterwards worshipped as Jupiter Indiges. A mound of earth, encircled with fine trees, on the bank of the little river Numicius was pointed out as his grave.[584] Romulus, too, the first king of Rome, [Sidenote: Death and deification of Romulus.] disappeared in like manner. It was the seventh of July, and the king was reviewing his army at the Goat’s Marsh, outside the walls of the city. Suddenly the sky lowered and a tempest burst, accompanied by peals of thunder. Soon the storm had swept by, leaving the brightness and serenity of the summer day behind. But Romulus was never seen again. Those who had stood by him said they saw him caught up to heaven in a whirlwind; and not long afterwards a certain Proculus Julius, a patrician of Alban birth and descent, declared on oath that Romulus had appeared to him clad in bright armour, and announced that the Romans were to worship him as a god under the name of Quirinus, and to build him a temple on the spot. The temple was built and the place was henceforth known as the Quirinal hill.[585] In this legend it is significant that the annunciation of the king’s divinity should be put in the mouth of a member of the Julian house, a native of Alba; for we have seen reason to believe that at Alba the Julii had competed with the Silvii, from whom Romulus was descended, for the kingship, and with it for the honour of personating Jupiter. If, as seems to be philologically possible, the word Quirinus is derived from the same root as _quercus_, “an oak,” the name of the deified Romulus would mean no more than “the oak-god,” that is, Jupiter.[586] Thus the tradition would square perfectly with the other indications of custom and legend which have led us to conclude that the kings both of Rome and of Alba claimed to embody in their own persons the god of the sky, of thunder, and of the oak. Certainly the stories which associated the deaths of so many of them with thunderstorms point to a close connexion with the god of thunder and lightning. A king who had been wont to fulminate in his lifetime might naturally be supposed at death to be carried up in a thunderstorm to heaven, there to discharge above the clouds the same duties which he had performed on earth. Such a tale would be all the more likely to attach itself to the twin Romulus, if the early Romans shared the widespread superstition that twins have