waterman, I really appreciate the info and the depth of your research, but please be careful. Campbell makes way to many assumptions and hypotheticals, and includes too much conjecture for me. He often states what he believes should, could, would happen without concrete facts. For me, his conjecture (what ifs?) almost nullifies the other good info in his books.
Kinda reminds me of Joe Kindig, or John Baird in the muzzleloading world. Took decades to relearn their mistakes, and folks still read their conjecture as gospel.