Sorry, I meant No we won't find semi-colon question marks, in answer to your "won't we" question. (I don't need to tell you how likely we are to find the lost books of Polybius - likelier than the lost books of Livy, I suppose, despite some freak papyrus finds.) But I was assuming ancient, like the old manuscripts in St. Catherine's on Mt. Sinai (not Turkey, I know). You won't find semi-colons in the Sinaiticus. (I trust I'm right about that: I haven't checked.) I don't know precisely when or how the ; got started, but ancient Greek knew no question mark.
I didn't mean to be provocative, I was just pointing out the weirdness of continuing to use a convention which is neither ancient nor modern. (At least there's some justification for iota subscript.) I'm waiting for some brave editor to print regular question marks -- or better, to use just one stop for all punctuation -- or better still, to go without punctuation altogether. It's the reader's job to decided whether something is a statement or a question (editors are often at variance, and often get it wrong), and think how much better readers we would be if we were forced to sensitize ourselves to the particles and other cues that do the job of articulating the text by themselves (ἆρα [cf. Spanish initial question mark], δέ, etc etc, quite different from English). Homer for one has no need of punctuation, does he? It's all built in to the text itself, and punctuation is supererogatory.