These performances follow the divisions of the text published at the Perseus site, http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3atext%3a1999.01.0133. Select ‘view text chunked by’ line, rather than book. I believe this is the default setting. I have sometimes departed from their text where there are errors or worthy manuscript variants, or else an editor’s choice of punctuation alters the tonal profile. The listener is invited to follow along in the Greek, and then close his eyes for the English.