08-07-2023, 05:14 PM
At the Beinecke.
"Manuscript on paper, composed in three parts, of a large number of practical procedures, chiefly alchemical but sometimes medical, with a few standard medieval alchemical texts by Khalid ibn Yazid, Theodoric, and Albertus Magnus. Occasionally there are passages in cipher, added by Martin Roesel of Rosenthal ca. 1586, long after the principal contents were written; the cipher seems to be of a simple number-substitution type."
https://collections.library.yale.edu/catalog/2056670
"Manuscript on paper, composed in three parts, of a large number of practical procedures, chiefly alchemical but sometimes medical, with a few standard medieval alchemical texts by Khalid ibn Yazid, Theodoric, and Albertus Magnus. Occasionally there are passages in cipher, added by Martin Roesel of Rosenthal ca. 1586, long after the principal contents were written; the cipher seems to be of a simple number-substitution type."
https://collections.library.yale.edu/catalog/2056670