Keywords: Steganography in the hand of John Dee.png Johannes Trithemius 1462-1516 which was originally written in the late 1490s Steganography is the act of writing in a secret code This version is in the hand of Dr John Dee Elizabeth I of England Queen Elizabeth I's ˜favourite philosopher ™ 1591 Institution National Library of Wales Peniarth MS 423D object history credit line accession number 4396400 Cc-zero John Dee Steganography Peniarth MS 423D Steganographia Images uploaded as part of NLW - WMUK collaboration |