Whoa.
The second ruin was a small Indian encampment ~ may have been a dozen families. Once you knew the outlines you could find cooking stones, grinding stones, stone knives, stone axes, buttons (yes, buttons ~ Indians had buttons), and traces of other items of daily use. You could also find little traces of charcoal in the dirt where it was pretty obvious a lodge or tent pole had caught fire, burned, fell to the ground, and made its mark.
Their settlement had burned to the ground just as if the only thing missing were the people.
I figured it disappeared back in the 1500s or so when the Iriquois begain extending their reach into the Ohio Valley ~ they used terror to collect taxes (mostly furs, food products, tanned leather)
I know what a village that burned to the ground looks like and feels like.
I see millions of them coming soon.