We cite the passage here merely to illustrate the custom of consulting oracles in ‘extradition’ disputes. The theory which connects Apollo with the doctrine of homicide as a ‘pollution’ finds further confirmation in many Greek legends. The story of the purgation of Ixion by Zeus, which is first referred to by Pindar[210] and by Aeschylus,[211] is, we think, an instance of ‘reconstruction,’ or ‘retrojection,’ on the part of legend-makers who were less concerned with the matter of consistency in the character of Zeus than with the maintenance of his exalted rôle in the Olympian religion of post-Homeric days, which tended to extol Apollo the Son over Zeus the Father. Sidgwick’s view[212] that this legend originated in an attempt to derive the name _Ixion_ from the root ἴκ as found in the words ἱκέτης and ἱκετεύειν (which refer to suppliant-rights) seems to us very probable. Pindar has perhaps been misinterpreted by Verrall[213] in the translation of ἐμφύλιον αἷμα as kindred-murder. We have seen[214] that the word ἔμφυλος sometimes carries this meaning in Homer. But in the Pindaric narrative it was his father-in-law whom Ixion slew, and fathers-in-law are not, as a rule, akin in blood to their sons-in-law, though they may belong to the same tribe (φυλή). Pindar asserts that the act of Ixion was malicious: but we have said[215] that for malicious kin-slaying purgation was not possible: ‘Of a kindred blood defiled,’ says Plato,[216] ‘there is no other cleansing ... before the life that has sinned shall pay kin blood for kin blood.’ Hence, it is necessary to suppose that Ixion was not akin to his victim. The legend of the purgation of Ixion is open to suspicion on the further ground that Ixion is said[217] to have been the first who ‘supplicated’ for purgation, and is said to have been purged _by Zeus_. Now Apollo, not Zeus, was the pioneer amongst the Purifying gods (καθάρσιοι θεοί). It was Apollo who purified Orestes, in the legend which Aeschylus follows in the _Eumenides_.[218] ‘Mine was the house,’ says Apollo, ‘and mine the hearth which received this suppliant, and I am the purger of his blood-guilt.’