Re: clay
Thank you for those sources and for the information.
Here is the clay book, I have my 3rd copy I think, not easy to find nowadays, this is a good price. Has some herb/diet stuff too, author is French, where they have a tradition of a lot of natural health measures.
Our Earth Our Cure (A Swan House Book) Paperback 1974
I see amazon has another book by same author, but at $25 I probably won’t get it, looks interesting though:
OOPS - second book is not the same author, but written by the man who translated the first book.