• Presidents of the USA received thousands of letters from Americans. Truman's predecessor, Franklin D Roosevelt, used to get 5,000 letters a day.
  
• We do not know a great deal about the writer. His letter was found in President Truman's correspondence files.
  
• As it says in the letter, the writer attached a copy of an article in the Los Angeles Times which reflected the views of Mr Johnston. The article was dated September 12th 1948 - the height of the Berlin Blockade tensions.