Sir Toby says:
"Taunt him with the license of ink: if thou thou'st him thrice, it shall not be amiss."
Twelfth Night, 3.2.42
Bacon himself doesn't have a parallel to this that we know of, but this could easily be a reference to a speech of Edward Coke that he made at the trial of Sir Walter Raleigh, when Coke said: "Thou Viper, for I thou thee, thou Traitor!"
Edward Coke was a long time enemy at court of Francis Bacon, so this could be one of Bacon's many jests at Coke.