Note 341 — Chapter VIII · FRIAR BACON
Reading edition
“Cipher” in Rees’ “Cyclopædia” and Klüber’s Kryptographik Lehrbuch, Tübingen, 1809. In a note to these chapters in the Theatricum Chemicum, Zetzner says: “Hic tamen jacta esse Steganographiæ fundamenta certissimum est.”