Thanks for kind remarks, everyone.
The scratches on the blade of the turnscrew are from pressure knapping flints.
I don't know if the bones come from an Indian encampment, as the small and thin bones (like deer) are all in one piece, but all the big buffalo and other large bones are broken, as though for extracting marrow.
They vary from brown to 'blue' in colour, so must be pretty old. How long does it take for bones to go grey-blue all the way through?
Best,
Richard.