Don Wiss turned me on to another “modern” paleo diet pioneer, Arnold Paul De Vries, who wrote a 1952 book called Primitive Man and His Food. I even found the book on the Internet a few months ago, perhaps in violation of copyright. I can’t find it now. You can request a digital copy of the book here.
I read his thoughts on the diets of North American Indians before my other duties interrupted me.
Steve Parker, M.D.
Reference (see Comments)