Clyde S. Kilby 11 October 1966
- Subject: Mr. and Mrs. Tolkien's Mediterranean cruise. Work on books and manuscripts.
- Publication: Excerpts from the letter have been published in SEVEN, Volume 27 (p. 49). Another part of the letter was published in The J.R.R. Tolkien Companion and Guide: Chronology (p. 676; the letter is also referred to on p. 675, entry for 6 October 1966).