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The original was posted on /r/todayilearned by /u/DEFINITELY_NOT_PETE on 2023-09-27 06:32:49.

Original Title: TIL that Deborah Harkness, author of A Discovery of Witches (a novel about a scholar who finds a lost book of magic at Oxford), actually found Aldaraia, a long lost 16th century treatise on magic in Oxford’s library.