I copied Cleanth Brooks's letters years ago and can't find them now in packing boxes to send away. I found one today in a book.

 I noticed the book when I got down here, Arthur F. Kinney's G. K. Hall 1996 CRITICAL ESSAYS ON WILLIAM FAULKNER: THE SUTPEN FAMILY.  I saw Cleanth's letter first then checked the contents and saw that the last essay was my 1974 piece in Mississippi Quarterly, "What Quentin Saw 'Out There'"--the point being that he had learned the solution by seeing, not hearing.

Copying was so slow that I will do the second page later.