As Clytemnestra had taken part in the murder of Agamemnon, Orestes slew her also. This killing of his own mother provoked the anger of the gods, and Orestes was commanded to go to the oracle of Apollo, at Delphi, to learn there what punishment he should suffer for his crime. He obeyed, and the oracle told him that he must bring to Greece a statue of Diana which was then in the temple of that goddess in Taurica. This was a dangerous enterprise, for the king of Taurica had a practice of sacrificing in that very temple any foreigners found in his country. Nevertheless Orestes undertook the task. He went to Taurica, accompanied, as usual, by his ever faithful friend Pylades. No sooner had they arrived than they were seized and carried before the king, and condemned to be sacrificed. But Orestes discovered, to his surprise and delight, that the priestess of the temple was his own sister, Iphigenia, who, as will be remembered, had been carried away many years before by Diana herself, when about to be sacrificed by the Greeks at Aulis. By the help of Iphigenia, the two friends not only escaped from Taurica, but carried off the statue, and Iphigenia returned with them to Greece. Orestes succeeded to the throne of his father, and as king of Mycenæ he lived and reigned many years in prosperity and happiness. Menelaus returned to his kingdom of Sparta with his wife, Helen, but he had many wanderings and adventures. He was detained by unfavorable winds for some time on an island near the coast of Egypt, and he might never have reached home but for the advice he received from Proʹteus, one of the sea gods. It was no easy matter to get advice from Proteus. It was very difficult to find him, and still more difficult to get him to answer questions, for he had a habit of changing himself rapidly into many different forms, and so escaping from those who came to consult him. But Menelaus had the good fortune of meeting a water nymph named I-doʹthe-a, a daughter of Proteus, and she directed him what to do. There was a certain cave near the seaside, to which the Old Man of the Sea, as Proteus was sometimes called, came every day at noon to sleep. Idothea told Menelaus he would find the old man there, and that he must seize him quickly in his arms, and hold him fast in spite of all his changes, until he took the shape in which he had first appeared. Then he would answer any question put to him.