Janus,[69]--god of the past, present, and future; of gates and entrances; of war and peace,--was said to be the son of Apollo; but as he is a Roman god, and entirely unknown to Greek mythology, his ancestry is a matter of doubt. He presided over the beginning of everything, and was therefore invoked first in every undertaking--even before Jupiter. He opened the year and the seasons, and the first month of the year was called after him. He was the porter of heaven, and in this capacity he was represented as holding a key in his left hand and a staff or scepter in his right. On earth he was the guardian deity of gates, and as such he had always two faces turned in opposite directions, because every door looks both ways. Another explanation of his physical duality is that as god of the past and future he sees what is behind and what is before. Janus was also considered an emblem of the sun, and had therefore two faces, one to look at its rising and one to see its setting. Sometimes these faces were alike, but more often they were represented by a white-haired and white-bearded old man on the one side, and a smooth-cheeked youth on the other. At Rome Numa Pompilius is said to have dedicated to Janus the covered passage--erroneously called a temple--that stood close by the Forum. This was kept open in times of war and closed in times of peace; but such was the belligerent nature of the Romans that the gates were closed but three times in seven hundred years, and then only for a short period. As he was god of all beginnings, the first of every new year, month, and day was held sacred to Janus, and special prayers and sacrifices were then offered at his shrines. When he presides over the year, he is represented as holding the number three hundred in one hand and sixty-five in the other. Festivals in honor of Janus were celebrated on the first day of the new year, and on this day people exchanged visits, good wishes, and gifts, which usually consisted of sweetmeats and copper coins showing on one side the double head of Janus. The sacrifices offered to Janus on New Year's day and at other times of beginnings were barley, incense, cakes, and wine. III. Iris and Aurora Iris was the special attendant of Juno, and was often employed as a messenger by both Juno and Jupiter. In the Iliad she is the swift servant of the gods; but in the Odyssey it is Mercury who is the messenger to and from Olympus, and Iris is never mentioned. Sometimes Iris is described as the rainbow itself; sometimes the rainbow is only the road over which she travels, and which therefore vanishes when it is no longer needed. When Juno sends Iris to the Cave of Sleep "she assumes her garments of a thousand colors, and spans the heavens with her curving arch." As the personification of the rainbow--that brilliant phenomenon that vanishes as quickly as it appears--Iris might easily be considered the swift messenger of the gods. * * * * *