Hugh Kenner was a major literary critic who helped boost the reputation of Ezra Pound and who also wrote about James Joyce.
Robert Anton Wilson wrote to Kenner — and that correspondence has been preserved.
On July 23, Jonathan Goodman, associate professor of English at University of Louisiana, Lafayette wrote on Twitter, "Robert Anton Wilson wrote several letters to Hugh Kenner in which he argued that Kenner underestimated importance of Pound's economic ideas. And did not appreciate the importance of cybernetics."
When I asked Professor Goodman where those letters are available, he replied, "Harry Ransom Center."
That's a repository of papers and art at the University of Texas in Austin. I've actually been there. Years ago, I visited it and looked at the correspondence of Charles Henri Ford, a Surrealist poet I've been interested in for years. If I recall correctly, I was only allowed to make notes in pencil.
Anyway, the correspondence is there in Austin, if somebody wants to take a look. I doubt I can access it without being there in person.