Mafatih Asrar al-Huruf wa-Masabih al-Zuruf: Keys to the Secrets of the Letters (Arabic manuscript, Wellcome MS Arabic 609)
Public domain
Copy of al-Bistami's Mafatih asrar al-huruf, a work of Islamic letter-science catalogued under the Arabic alphabet and Islamic occultism. A unique undated manuscript copy (Wellcome MS Arabic 609), 94 leaves. Digitized by the Wellcome Collection and released under its Public Domain Mark.
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