Neat stuff. I just glanced over the link and if you half not done so already, you might want to ad a book titled “Salt: A world history” by Mark Kurlansky. As the title suggests it is a history of salt. It is by no means a “how to” manual but it does contain a lot of information on how salt was used to preserve food. As a side note the author has written another book called Cod, which kinda goes along with the salt book.
Thank you so much for all of your work, and for sharing the link. I have saved it to "favorites" for ongoing study; and have sent the link to several friends who are like-minded in the self-sufficiency department.