Martin de Acuña, an agent for Philip II, used a pigpen cipher in his letters to Philip II. The following is my reconstruction from the letter dated 27 January 1577, written on his way to Constantinople. (One can see the letters of the alphabet are arranged alphabetically among the three tables.)
I learned this in Blog el Salón de Cris. Its source is:Javier Marcos (2013-2014), "Sombras de Martín de Acuña 2: La Misión secreta de Martín de Acuña en el invierno de 1577, narrada por el mismo durante el viaje" (Archivo de la Fontera)
The paper notes one undeciphered passages in a letter from Mondéjar to Antonio Pérez dated 17 January 1577, reporting his doubts about Acuña's mission. If the same pigpen cipher is used, it will be readily deciphered with the above.For contemporary Spanish ciphers, see "Spanish Ciphers during the Reign of Philip II".


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