""The Cipher In The Plays And On The Tombstone"" is a book written by Ignatius Donnelly and published in 1900. The book explores the use of ciphers and codes in William Shakespeare's plays and on his tombstone. Donnelly, a politician and writer, argues that Shakespeare used ciphers and codes in his works to convey hidden messages and secrets. He also claims that the inscription on Shakespeare's tombstone contains a cipher that reveals the true identity...