This ninth book, Sossius Senecio, contains the discourses we held at Athens at the Muses feast, for this number nine is agreeable to the number of the Muses. Nor must you wonder when you find more than ten questions (which number I have observed in my other books) in it; for we ought to give the Muses all that belongs to them, and be as careful of robbing them as of a temple, since we owe them much more and much better things than these.