Yeah, it is really interesting; as I mentioned, at the time of Lewis and Clark, there were already stories of blonde Indians and a tribe of lost Welshmen. Lewis & Clark were always expecting to find them...just around the next river bend....just down a little further...but of course, L&C never did find them.
Seems to me I just watched something on the Travel Channel Thursday or Friday evening about mysterious ruins similar to Stonehenge, except on the North American Continent. Can't quite remember where it was, but Phoenician type writing or gliphs were mentioned.
There's all kinds of stuff we don't know today; the information isn't quite in our grasp--at least in the grasp of white people.