I had the opportunity to take "earlyglass" and "Southern Ohio Digger" diving with me on my 44th BD to a new spot that has given up some really early glass. We did not find any bottles but did find a slew of marbles.
I find the marbles as I am digging for bottles, I have the best luck downstream of early bridge sites and these were found directly under an old foot bridge that has a history of being a bridge site back into the early 1800's.