… sounds plausible, a duodecimal line-numbering structure organizing the Platonic texts:
[Jay] Kennedy argues that this is no accident. “We know that scribes were paid by the number of lines, library catalogues had the total number of lines, so everyone was counting lines,” he said. He believes that Plato was organising his texts according to a 12-note musical scale, attributed to Pythagoras, which he certainly knew about.
“My claim,” says Kennedy, “is that Plato used that technology of line counting to keep track of where he was in his text and to embed symbolic passages at regular intervals.” Knowing how he did so “unlocks the gate to the labyrinth of symbolic messages in Plato”.
Believing that this pattern corresponds to the 12-note musical scale widely used by Pythagoreans, Kennedy divided the texts into equal 12ths and found that “significant concepts and narrative turns” within the dialogues are generally located at their junctures. Positive concepts are lodged at the harmonious third, fourth, sixth, eight and ninth “notes”, which were considered to be most harmonious with the 12th; while negative concepts are found at the more dissonant fifth, seventh, 10th and 11th.
Time Spiral Press 