The next point to consider is wheth

The next point to consider is whether the elaborate system of arrangement, which we have noted in I.1-19 and in I.23.4-2.1, can be dated in relation to the remainder of Thucydides' work and in relation to fifth-century literature. Here we must distinguish between the simple form, that is the thesis-proof thesis cycle as a single unit, and the compound form which occurs at I.1-19, I.3- 4 fin. -8, and I. 23. 4-2.1. The simple form occurs in later books of Thucydides, for example at 5.26.1fin-3 in the second introduction. The same idiom is found in some later writers. For example in Aristotle Poetics 1448b4-23, or 1450a15-23. And there are many examples of such an arrangement of thought in writers of verse and especially in the plays of Sophocles.