Francis Bacon, 1st Viscount St. Alban, Kt., KC (22 January 1561 – 9 April 1626) was an English philosopher, statesman, scientist, jurist, and author. He served both as Attorney General and Lord Chancellor of England. Although his political career ended in disgrace, he remained extremely influential through his works, especially as philosophical advocate and practitioner of the scientific method during the scientific revolution.
Involved in the development of Bacon's cipher.
Alleged by some to have inserted cryptic texts into various other documents - claims which have been disproved by eg Elizabeth Wells Gallup
There is a proposal - described here  that the Voynich Manuscript was actually constructed as a false book made to look as if it had come from Bacon's fictional island of New Atlantis  - the dating of the manuscript goes against this theory.
For other persons of the same name see the Wikipedia disambiguation page . ]