Apollodorus Library 1.4

[1]
  Of the daughters of Coeus, Asteria in the likeness of a quail flung herself into the sea in order to escape the amorous advances of Zeus, and a city was formerly called after her Asteria, but afterwards it was named Delos. ¹ But Latona for her intrigue with Zeus was hunted by Hera over the whole earth, till she came to Delos and brought forth first Artemis, by the help of whose midwifery she afterwards gave birth to Apollo. ²
  Now Artemis devoted herself to the chase and remained a maid; but Apollo learned the art of prophecy from Pan, the son of Zeus and Hybris, ³ and came to Delphi, where Themis at that time used to deliver oracles; ⁴ and when the snake Python, which guarded the oracle, would have hindered him from approaching the chasm, ⁵ he killed it and took over the oracle. ⁶ Not long afterwards he slew also Tityus, who was a son of Zeus and Elare, daughter of Orchomenus; for her, after he had debauched her, Zeus hid under the earth for fear of Hera, and brought forth to the light the son Tityus, of monstrous size, whom she had borne in her womb. ⁷ When Latona came to Pytho, Tityus beheld her, and overpowered by lust drew her to him. But she called her children to her aid, and they shot him down with their arrows. And he is punished even after death; for vultures eat his heart in Hades. ⁸

[2]
  Apollo also slew Marsyas, the son of Olympus. For Marsyas, having found the pipes which Athena had thrown away because they disfigured her face, ⁹ engaged in a musical contest with Apollo. They agreed that the victor should work his will on the vanquished, and when the trial took place Apollo turned his lyre upside down in the competition and bade Marsyas do the same. But Marsyas could not, so Apollo was judged the victor and despatched Marsyas by hanging him on a tall pine tree and stripping off his skin. ¹⁰

[3]
  And Artemis slew Orion in Delos. ¹¹ They say that he was of gigantic stature and born of the earth; but Pherecydes says that he was a son of Poseidon and Euryale. ¹² Poseidon bestowed on him the power of striding across the sea. ¹³ He first married Side, ¹⁴ whom Hera cast into Hades because she rivalled herself in beauty. Afterwards he went to Chios and wooed Merope, daughter of Oenopion. But Oenopion made him drunk, put out his eyes as he slept, and cast him on the beach. But he went to the smithy of Hephaestus, and snatching up a lad set him on his shoulders and bade him lead him to the sunrise. Being come thither he was healed by the sun's rays, and having recovered his sight he hastened with all speed against Oenopion.

[4] But for him Poseidon had made ready a house under the earth constructed by Hephaestus. ¹⁵ And Dawn fell in love with Orion and carried him off and brought him to Delos; for Aphrodite caused Dawn to be perpetually in love, because she had bedded with Ares.

[5] But Orion was killed, as some say, for challenging Artemis to a match at quoits, but some say he was shot by Artemis for offering violence to Opis, one of the maidens who had come from the Hyperboreans. ¹⁶
  Poseidon wedded Amphitrite, daughter of Ocean, and there were born to him Triton ¹⁷ and Rhode, who was married to the Sun. ¹⁸