Turn AMC on Twitter: "Secret messages were passed using a Cardan Grille during the #TURNrevolution. Learn more: http://t.co/Vij28p49JX http://t.co/bU1u7etRqq" / Twitter
A cipher wheel inspired by Rene Zandbergen's paper "The Cardan grille approach to the Voynich MS taken to the next level" : r/voynich
World's most mysterious book may be a hoax | Nature