 He went to Tauris with Pylades, and the pair were at once imprisoned by the people, among whom the custom was to sacrifice all Greek strangers to Artemis.The priestess of Artemis, whose duty it was to perform the sacrifice, was Orestes' sister Iphigenia.She offered to release him if he would carry home a letter from her to Greece; he refused to go, but bids Pylades to take the letter while he stays to be slain.