Diplomat magazine, October 1966

I would like it, yes.

Someone nabbed it via PM. Thanks for the interest!

Ah, ok. Can you tell me if the "Tolkien on Tolkien" article contains more than what is reprinted in Letters no. 165 (i.e., the c.1955 statement for HM (pp.218–20) + the three paragraphs from the 1964 letter to Nancy Smith (p.221))?

Scratch that, I was able to verify independently that it does not. Thanks again.

It was derived from those two original sources (as were the edited versions that appear in Letters). I don't think there is anything significant in Tolkien on Tolkien but there are differences (mostly typos during transcription, though Letters also has an error or two noted by H&S as well). See S&H's Companion and Guide, Reader's Guide Part II (2017), pp. 1317-1319 ("Tolkien on Tolkien").

Based on H&S's note, they are pretty much the same though intermixed.

The map in Diplomat is worth the price of admission itself, in my opinion. Hilarious 60s style fever dream. See this thread for a few pictures from it.

Yes I saw the bits of the map you posted there. Very interesting!