I got this interesting link from my brother. Evidently, they're cataloging every bit of correspondence Merton ever wrote. I wish we could easily access Dad's letters to him. The family still has the original of Merton's response, which I remember Dad showing me. As a child, I was impressed that a man whose books lined our family room shelves was writing to Dad on a manual typewriter! Dad once commented to me that he couldn't always follow him, but he knew that Merton was still worth reading!
Dad also corresponded, on a longer basis, with Father Raymond (born Joseph Flanagan), quite a different writer in his style and approach. We had a full shelf of Father Raymond's books at home, too.