One can see the effect of the tradition also in his treatment of the terms Anagnorisis and Peripeteia, which Professor Bywater translates as 'Discovery and Peripety' and Professor Butcher as 'Recognition and Reversal of Fortune'. Aristotle assumes that these two elements are normally present in any tragedy, except those which he calls 'simple'; we may say, roughly, in any tragedy that really has a plot. This strikes a modern reader as a very arbitrary assumption. Reversals of Fortune of some sort are perhaps usual in any varied plot, but surely not Recognitions? The clue to the puzzle lies, it can scarcely be doubted, in the historical origin of tragedy. Tragedy, according to Greek tradition, is originally the ritual play of Dionysus, performed at his festival, and representing, as Herodotus tells us, the 'sufferings' or 'passion' of that God. We are never directly told what these 'sufferings' were which were so represented; but Herodotus remarks that he found in Egypt a ritual that was 'in almost all points the same'. (1) This was the well-known ritual of Osiris, in which the god was torn in pieces, lamented, searched for, discovered or recognized, and the mourning by a sudden Reversal turned into joy. In any tragedy which still retained the stamp of its Dionysiac origin, this Discovery and Peripety might normally be expected to occur, and to occur together. I have tried to show elsewhere how many of our extant tragedies do, as a matter of fact, show the marks of this ritual.(2) (1) Cf. Hdt. ii. 48; cf. 42,144. The name of Dionysus must not be openly mentioned in connexion with mourning (ib. 61, 132, 86). This may help to explain the transference of the tragic shows to other heroes. (2) In Miss Harrison's _Themis_, pp. 341-63.