The author of the document was Philip Johnston, a private citizen who had served as a code talker in World War I. The intended audience was Harry S. Truman, the president of the United States at the time. The document was written on September 12, 1948. The author wrote it to express his opinion on the Berlin blockade and to suggest a possible solution to end it peacefully. The author proposed that Truman should offer to hold a plebiscite (a direct vote by the people) in Berlin to let the citizens decide whether they wanted to be part of East Germany or West Germany. The author claimed that this would be a fair and democratic way to resolve the conflict and that it would expose the Soviet Union’s tyranny and aggression. The author also praised Truman for his leadership and courage in dealing with the crisis. Based on the tone and content of the document, it seems that Philip Johnston was a supporter of Truman and his policies.