And now I will unclaspe a Secret booke, Whereas Shakespeare's literary genius is universally recognized, there is also a hidden, secretive side to his work that is little known. Indeed, he used a mysterious code that figures widely in the...
And to your quicke conceyving Discontents,
Ille reade you Matter, deepe and dangerous
As full of peril and adventurous Spirit . . .
--William Shakespeare, King Henry IV, part 1