This early 14th-century manuscript, newly digitised by @DigitaVaticana as reported by @gundormr, contains texts on magic - mainly the Ars notoria, which was used to impart perfect memory and learning.
— Anna Dorofeeva (@LitteraCarolina) February 8, 2020
If you try it out, do report back.
Online here: https://t.co/yE1R08Lw6M pic.twitter.com/Js9vO8gCaw