XJF115139 Illustration from Book 9 of \'Cryptomenysis and Cryptography\' by Gustavus Selenus (Augustus, Duke of Brunswick), 1624 (engraving) (b&w photo) by German School, (17th century); Private Collection; (add.info.: dedicated to Johannes Tritheim (Heidenberg) Abbot of Sponheim (1462-1516); first important writer on cryptography;); German, out of copyright.