A new book about the history of the AT was published this week. I have not read it yet.

https://www.atbiography.com/​

There is an excerpt here. This part of MacKaye's story only got a couple of sentences of attention in my book (The Appalachian Trail) published a few years ago by the ATC.

https://www.thedailybeast.com/the-tr...alachian-trail