It is probable that in Greece the ‘cleansers’ of homicide-guilt were always ‘priests’ of some kind. Epimenides of Crete purged the city of Athens on a famous occasion, yet not from murder but rather from sacrilege[125]; moreover, Müller points out[126] that he was a native of Phaestus in Crete where there was a very ancient cult of Apollo; hence Epimenides was more than probably a member of an Apolline sacerdotal guild. Müller is, however, we think mistaken in regarding purgation for homicide as the exclusive privilege of Apolline priests. The Euripidean reference to purgation by a priestess of Artemis which we have just cited,[127] Athene’s interpretation[128] of the supplication of Orestes as a supplication for purgation, in the _Eumenides_ of Aeschylus, and many passages in the _Laws_ of Plato,[129] reveal the error of this opinion. The purgation of Orestes by Apollo is described by Aeschylus in the _Eumenides_. It is no priest or priestess of Olympian or Chthonian gods, but Apollo himself,[130] the chief of the καθάρσιοι θεοί, who performs the rite. We cannot interpret the ceremony as the purgation of a wilful matricide ‘abroad,’ as we think that such purgation was impossible, at least in historical times.[131] It is the ‘purging’ rather of a deed which is either justified or extenuated by Apollo’s express command, a ‘purging’ which would normally take place in the slayer’s home-land but which is here attributed to a divine Delphian purifier either because Apollo was the patron of the Greek ‘purgation’ system or because the deed was such that no one could have cleansed it save the god who had commanded it, or because a Phocian legend made Phocis, not Athens, the place to which Orestes fled after the slaying of his mother. Orestes tells[132] Athene that he is not a suppliant for purgation at Athens, because he has been already ‘purged.’ We may infer from this that a homicide-exile had not to be ‘purged’ more than once in his changes of residence abroad, but we think it probable that such ‘extern’ purgation did not dispense with the need for ‘domestic’ purgation if the exile was ever permitted to return to his home.[133] Orestes says[134]: ‘There is a law that the shedder of blood is debarred from human intercourse until at the hands of a man who purifies from bloodshed the blood of a young animal has been poured upon him. Long ago have I been thus made clean by others who live elsewhere, by animal victims beside running water.’