http://online.wsj.com/article/SB124648494429082661...Over+200+years+ago%2C+Thomas+Jefferson%27s+friend+created+a+cipher+that+was+unsolved+--+until+now.
For more than 200 years, buried deep within Thomas Jefferson's correspondence and papers, there lay a mysterious cipher -- a coded message that appears to have remained unsolved. Until now.
The cryptic message was sent to President Jefferson in December 1801 by his friend and frequent correspondent, Robert Patterson, a math professor.