The structure of book 1 of Proclus' commentary

Book one covers the first 204 pages of the first volume of the Greek edition by E. Diehl. In the course of these two hundred pages Proclus introduces his treatment of the work as a whole in about thirteen pages. He then discusses just under fourteen pages of Burnet's Greek text of Plato, from 17a to 27b of the Stephanus edition that supplies the universal method of referring to Plato's text in modern times. That means that it is entirely given over to matters that precede Timaeus' treatment of the physical world, the part that has been so influential over two millennia, and the only part of interest to many scholars. In the course of these pages Socrates had provided a summary of some of the most prominent features of the state that had been proposed at length in the Republic, explaining that he would like to be able to picture that state in operation. And then Critias had explained the feast of words that others then present planned to offer Socrates in return, including a preliminary treatment of a story supposed to have been passed down to him by his grandfather, who had heard it from Solon, who had in turn heard it from an Egyptian priest. That story had been about a conflict between prehistoric Athens, the city of Athena, and Atlantis, once sacred to Poseidon.