The conception of homicide as a pollution or religious offence is known to have existed at an early date amongst the Hebrews, and we may hazard the conjecture, though we find no express reference to the fact, that a system of purgation was practised by the Hebrews, at least for minor degrees of guilt. The penalties exacted for homicide amongst the Hebrews, as amongst the Romans, were much more severe than those which prevailed amongst the Greeks. We have seen[76] that in the normal operation of homicide-purgation no religious ‘cleansing’ was valid while the civic penalty remained unpaid. In Roman law, death was the penalty prescribed for murder and for manslaughter: but for justifiable or justifiably accidental homicide[77] there was no punishment, and religious expiation could immediately take place. Amongst the Hebrews, a similar penalty was exacted for murder and manslaughter. ‘Whoso sheddeth man’s blood, by man shall his blood be shed’ is the general principle[78]; and again: ‘He that smiteth a man so that he die[79] shall surely be put to death: if a man slays presumptuously with guile, take him from my altar that he may die.’[80] For accidental or justifiable slaying, however, we find that a mode of escape from the avengers of blood was provided: ‘If God delivers a man into his hands,[81] I will appoint thee a place whither he shall flee[82] ... and ye shall not take compensation for him that is fled to the City of Refuge that he should come home before the death of the high-priest. So ye shall not pollute the land wherein ye are.’[83] We may assume, with some degree of probability, that in this class of homicide, some form of purgation ceremony was customary. We mention the Hebrew custom here merely to show the general trend of Asiatic thought in regard to homicide. We may, therefore, regard as highly probable the view which connects the origin of the post-Homeric Greek notion of homicide as a ‘pollution’ with the Semites and Asiatic peoples. Glotz merely states his view of this matter without giving reasons in support of his statement.[84] ‘Alors,’ he says, ‘les Grecs prendront aux Sémites les rites dramatiques de leurs cérémonies purificatoires.’ There were, however, some important differences between the original Semitic doctrine and the matured Greek adaptation of it, as will be evident from a brief explanation of the precise nature of the Greek ‘pollution’ doctrine. THE GREEK POLLUTION DOCTRINE At first, we think, there came to Greece a vague rumour of the doctrine through the medium of the Cyclic poets. Greek priesthoods in Asia had already adopted it because of their proximity to Asiatic races who had developed it. But originating, as it did, in the centralised theocracies which then existed amongst these races, the doctrine could be accepted only in a modified form by the Greek people whose predominant political institution was the city-state.