To The Director,
Bureau of Investigation,
U.S. Department of Justice, Washington.
Dear Sir-After a great deal of thought I have finally decided to write to you. This letter probably sounds mysterious, but at the moment, mystery is necessary.
During the last two or three months I have, by accident, obtained knowledge of certain matters which, I believe, should properly be dealt with by your department. These criminal matters are of a federal nature. I do not wish to say anything more at this ...