Only just found this episode

Brattlecast #67 - Tolkien Care of Business
March 3, 2020

J.R.R. Tolkien is the author of The Hobbit, The Lord of the Rings, and, less famously but most importantly for our purposes, a charming letter to his publisher in which he attempts to answer questions from the public about himself and his work. On this episode, Ken reads from that letter, and talks about the chain of fascinating friendships that helped it find its way into his shop. Plus he’ll discuss the effect that the popular Peter Jackson films had on the collectability and value of Tolkien’s first editions.

http://www.brattlebookshop.com/brattl ... -tolkien-care-of-business

Quite a lot of mistakes made by the presenters. But still an interesting listen. The letter that they talk about is from Anne Ford and is mentioned in the Scull & Hammond Chronology (2nd edition) page 481 and page 484