larkfall:

Pages from a triangular magical book attributed to Le Comte de St. Germain, from the Manly Palmer Hall collection.

A helpful comment on the host page from one AMHall: 

“This manuscript bought from Frank Hollings, a London antiquary, after 1933 (he apparently was unaware of the Hauser St. Germain manuscript) came from the occult library of Mme. Barbe, who had it from the bibliographer Stanislaus de Guaita, who in turn bought it at the auction of the library of Jules Favre. It is a copy made from one of the magical texts in the possession of St. Germain by the owner’s permission. A number of such copies were executed for the members of his Masonic lodge in Paris, and the following manuscript, as different in style as it is, may be one of the copies too. It is unclear in both cases whether the Comte St. Germain wrote the magical formulae or owned a copy of an ancient text. This manuscript was made for Antoine Louis Moret, a French emigre to America active in Masonry and in politics.”