Saskpetic, the "Minaret skull" comes to mind for me as something like what you describe. Couldn't agree more. Only anecdotal, but D. Boone also is said to have related an episode of killing a BF like critter. As somebody who opened up an entire trans-Appalachian wilderness on the mere strength of his word about the quality of the hunting there, I would have expected him to be very circumspect about spreading tall tales on that subject.
White USA citizens of European ancestry, such as myself, are gradually waking up the unprecedented scope of the biological die-off of the Indian cultures we unwittingly unleashed on this continent merely by showing up. After a lifetime of reading and studying about the remnant populations, their culture, habits and ceremonies, I can only guess as to what was lost. We'll just never know. There is also one thing you can also count on: The last thing any Indian would ever do is divulge the content of his medicine bundle to a wasichu. Better it be concealed, or evenn destroyed. Most were, we think. Some are still rumoured to exist today, as a holy of holies, so to speak. It is anyone's guess as to what is in them, and I don't expect to find out.