From 1990: George Plimpton interviews the acclaimed poet, who died Wednesday at age 86:

When I finish maybe fifty pages and read them—fifty acceptable pages—it’s not too bad. I’ve had the same editor since 1967. Many times he has said to me over the years or asked me, Why would you use a semicolon instead of a colon? And many times over the years I have said to him things like: I will never speak to you again. Forever. Goodbye. That is it. Thank you very much. And I leave. Then I read the piece and I think of his suggestions. I send him a telegram that says, OK, so you’re right. So what? Don’t ever mention this to me again. If you do, I will never speak to you again. About two years ago I was visiting him and his wife in the Hamptons. I was at the end of a dining room table with a sit-down dinner of about fourteen people. Way at the end I said to someone, I sent him telegrams over the years. From the other end of the table he said, And I’ve kept every one! Brute! But the editing, one’s own editing, before the editor sees it, is the most important.