the English plain text into the constructed language Toki Pona by Matthew Martin. See also References Citations Bibliography ; (Books Express Publishing, 2011, ) Further reading External links — navigating through high-resolution scans Analyst websites News and documentaries news – summary of Gordon Rugg's paper directed towards a more general audience 15th-century manuscripts History of cryptography Scientific illuminated manuscripts Undeciphered historical codes and ciphers Works of unknown authorship Yale University Library