After Helius, Hephæstus, Ammon, and Hermes, says Diodorus,[59] Cronos and his sister Rhea ruled. These became the parents of Isis and Osiris, of Typhon, Apollo, and Aphrodite. Plutarch tells us that, according to the legend of the Egyptians, Rhea and Cronos were the parents of Osiris and Isis, of Typhon and Nephthys. Osiris ruled happily over Egypt; but Typhon conspired against him with seventy-two associates; they inclosed Osiris in a chest and threw it into the Nile, and the stream carried it down to the sea. When Isis heard of it, she put on mourning, and sought with lamentation the body of Osiris. At last she found the chest in the neighbourhood of Byblus, where the sea had cast it up; she mourned over the corpse and carried it back to Egypt. And when Horus, the son of Isis and Osiris, who grew up in Buto, came to his full strength, he prepared to avenge the wrong which Typhon had done to his father and mother. Thrice he fought with Typhon; the battle raged for many days, and Horus conquered.[60] According to the accounts of Herodotus and Diodorus, Osiris (Dionysus) and Horus (the Apollo of the Greeks) were the last rulers of the divine race.[61] In the list of Manetho, Ptah was followed in the kingdom by Ra and Shu (or, according to the Theban account, by Ammon, Tum, and Shu), Cronos, Osiris, Typhon, and Horus. These then are the younger gods; the evidence of the monuments shows that they were connected by race with each other, but not akin to the three gods who ruled before them. And as we also find that the five supplementary days added in the Egyptian year to the original number of 360 (p. 29) were dedicated to these gods, the first to Osiris, the second to Horus, the third to Typhon, the fourth to Isis, the fifth to Nephthys--the natural conclusion is that these gods were of later origin.[62] On the other hand it is clear that the belief in Osiris and his power had already arisen at the time when the great pyramids were erected. The two gods at the head of this circle, whom Diodorus and Plutarch call Cronos and Rhea, were known to the Egyptians under the names Seb and Nut.[63] They are the spirits of the earth and sky. Osiris himself in the inscriptions and records is called "the king of the gods," "the lord of unnumbered days," "the king of life," "the regulator of eternity." The inscription on the lid of a coffin runs thus--"Ra gave thee the richly streaming light which gleams in thy eyes. Shu gave thee the pleasant air which in thy lifetime was inhaled in thy nostrils. Seb gave thee all fruits whereon thou livest. Osiris gave thee the Nile-water whereon thou livest."[64] As a life-giving god, the colour of Osiris is green; his sacred tree is the evergreen tamarisk; and his sacred bird a kind of heron, distinguished by two long feathers at the back of the head. Osiris is always represented in a human form, and with a human head.