New York: 1971.
1 page on personal letterhead, 11 x 8.5 inches, New York City, June 6, 1971, in full: "Thank you for a copy of your open letter. Patriotism is never out of style; be wary of Jingoism, however." Two horizontal folds; light creasing along the right margin. Very good(+) condition.
Three-time Pulitzer Prize-winning American dramatist best remembered for such modern classics as "Who's Afraid of Virginia Woolf," "A Delicate Balance," and "Seascape."