Written 1758 the Mytho-Hermetic Dictionary defines the most obscure of terms, substances and concepts employed by the enigmatic authors of the alchemical texts. Its entries unlock the Hermetic mysteries veiled by the motifs, allegories and symbols of the classical myths as well as making clear what substances are implied by the terms expressed by the 'Language of the Birds'. In addition to the comprehensive entries, the Mytho-Hermetic Dictionary is a treasure-house of classical and alchemical imagery, containing over 80 illustrations in the text and featuring the symbols, signs and iconography of the art.

This copy is from the collection of Thelemic author Robert C. Stein (1931 – 2024), who wrote "The Mystery of the Letters and The Tree of Life" and other works. Stein was a Professor Emeritus of Biology in the New York State University System, whose involvement in the study and practice of Thelema spanned three decades and travels in five continents.