( Duke of Brunswick-Luneburg ), Gustavus Selenus Cryptomenytices et Cryptographiæ Libri IX , first edition , half-title, title within fine engraved historiated border, folding letter-press table, 3 engraved illustrations, woodcut diagrams, musical notation, initials, head- and tail-pieces and printer's device at end, holes in upper margin of half-title repaired, N3 upper corner repaired with loss of page number, stain to lower margin of 2R3 to end, just within text / image on 2S6, short tear within stain to 2S4-6, occasional spotting, lightly browned, contemporary calf, rebacked, rubbed and scuffed, [Caillet 10114], folio, [Luneburg], [Johann and Heinrich Stern], 1624. On codes and secret writing. Printed the year after the First Folio the engraved title is of particular interest. It purports to attribute the authorship of Shakespeare's plays to Sir Francis Bacon. One panel supposedly depicts Bacon handing a text to Shakespeare (a man holding a spear), while another supposedly depicts Augustus holding the Cap of Maintenance over the head of Bacon, who is writing on a folio-sized piece of paper.