In a letter to Paul Engle on December 3rd, 1944, Robert Penn Warren discusses visiting the Iowa Writers’ Workshop to teach as a visiting professor:

I shall be delighted to come to Iowa, on all counts. As to the business of the date and what is expected of my once I am there, I don’t have any very clear idea.

Later in the letter, he mentions how he reads Coleridge on “breaks” from his novel:

I have been working on a study of ‘The Ancient Mariner,’ but it is yet in a very confused condition, and it might be months before I finish it. (You see, I am on the down grade of a novel, and I simply put a little work in on the Coleridge in the moments when I’m bored or stale on the novel.)

This letter, along with additional Penn Warren papers, is held at the University of Iowa Special Collections in the Main Library.