I did this interview around 2014 with Georg Dehn, who compiled a more accurate translation of The Sacred Magick of Abramelin the Mage. He talks about the additional original book, the magick squares being filled, and other details that separate his book from the French Translation from Mathers.
https://archive.org/details/MageiaPodcastS1E3TheBookOfAbramelinFirstEnglishInterviewWithGeorgDehn