I've been reading about this grimoire and thought I would share an interesting 2013 comparison between the text and that of Hockley's "Complete Book" by Stephen Murtaugh on the subject. - S+A
Title: "Authentication of 'The Secret Grimoire of Turiel' in comparison with Frederick Hockley's 'A Complete Book of Magic Science'"
Abstract: Analysis is made of “The Secret Grimoire of Turiel,” in comparison with Frederick Hockley's “A Complete Book of Magic Science”; in order to determine the authenticity, provenance, and date of the “Grimoire.”
Read it for free online at Academia.edu: