Triangular Book of St. Germain (18th c. manuscript)

The Triangular Book of St. Germain, or simply the Triangular Manuscript, is an untitled 18th-century French manuscript of ciphered text attributed to the Comte de Saint Germain, each print fabricated in the shape of an equilateral triangle. The two extant copies are Hogart MS 209 (c. 1750) and 210 (c. 1775), both currently held by the Manly Palmer Hall Collection of Alchemical Manuscripts at the Getty Research Library.