Diogenes Laertius Vitae philosophorum 3.1.47

[47] and in this Polemo agrees. Sabinus makes Demosthenes his pupil, quoting, in the fourth book of his Materials for Criticism, Mnesistratus of Thasos as his authority. And it is not improbable. ¹

Now, as you are an enthusiastic Platonist, and rightly so, and as you eagerly seek out that philosopher’s doctrines in preference to all others, I have thought it necessary to give some account of the true nature of his discourses, the arrangement of the dialogues, and the method of his inductive procedure, as far as possible in an elementary manner and in main outline, in order that the facts I have collected respecting his life may not suffer by the omission of his doctrines. For, in the words of the proverb, it would be taking owls to Athens, were I to give you of all people the full particulars.