TLS on Herman Wouk's personal letterhead, dated February 19, 1968.  The letter is expressing his appreciation for a play he was involved with.  This is a personal letter he wrote to a friend.  Signed at the conclusion in blue ballpoint ink "Herman." 

(1915-2019) Herman Wouk was an American author best known for historical fiction such as The Caine Mutiny (1951) for which he won the Pulitzer Prize in fiction.

Comes with a full Letter of Authenticity from Todd Mueller Authentics if the item sells for $10 and over.