(M5) Osiris was the offspring of an intrigue between the earth-god Seb (Keb or Geb, as the name is sometimes transliterated) and the sky-goddess Nut. The Greeks identified his parents with their own deities Cronus and Rhea. When the sun-god Ra perceived that his wife Nut had been unfaithful to him, he declared with a curse that she should be delivered of the child in no month and no year. But the goddess had another lover, the god Thoth or Hermes, as the Greeks called him, and he playing at draughts with the moon won from her a seventy-second part(5) of every day, and having compounded five whole days out of these parts he added them to the Egyptian year of three hundred and sixty days. This was the mythical origin of the five supplementary days which the Egyptians annually inserted at the end of every year in order to establish a harmony between lunar and solar time.(6) On these five days, regarded as outside the year of twelve months, the curse of the sun-god did not rest, and accordingly Osiris was born on the first of them. At his nativity a voice rang out proclaiming that the Lord of All had come into the world. Some say that a certain Pamyles heard a voice from the temple at Thebes bidding him announce with a shout that a great king, the beneficent Osiris, was born. But Osiris was not the only child of his mother. On the second of the supplementary days she gave birth to the elder Horus, on the third to the god Set, whom the Greeks called Typhon, on the fourth to the goddess Isis, and on the fifth to the goddess Nephthys.(7) Afterwards Set married his sister Nephthys, and Osiris married his sister Isis.