The “Siphra Dtzenioutha,” or “Book of Concealed Mystery,” is the most difficult of comprehension. Mr. Mathers adds a running commentary of his own, which proves to be very valuable. It consists of five chapters; in the first are found references to the Mystical Equilibrium, the worlds of unbalanced force characterised as the Edomite kings, the Vast Countenance, Theli the Dragon, the powers of IHVH, and the essence of the female power—the Mother. The second chapter mentions the Beard of Truth, and passes on to define Microprosopus. The third chapter treats of the Beard of Microprosopus in an allegorical manner, and of the formation of the Supernal Man. An annotation follows concerning Prayer, and a curious note on the word AMEN! as composed of IHVH, and ADNI Adonai or Lord. Chapter IV. treats of the male and female essences, and has a curious note on the Hebrew letter Hé, speaking of it as female, and composed of D, Daleth, and I, Jod—a great mystery worthy of study. Chapter V. speaks of the Supernal Eden, the Heavens, the Earth, the Waters, the Giants-Nephilim in the earth, wars of the kings, the tree of knowledge of good and evil, the serpent, and the houses of judgment; so that this treatise is no less discursive than abstruse. The “Idra Rabba,” or “Greater Holy Assembly,” consisted of ten Rabbis, of whom Rabbi Schimeon was chief, and the book contains their several speeches and comments upon the doctrines laid down by Rabbi Schimeon, on a similar plan to the conversations narrated in the Book of Job. Twenty-five chapters are occupied with an allegory of the several parts of Macroprosopus, the type of God the Father; the twenty-sixth concerns the Edomite kings, the vanished creations; Chapters XXVII. to XLII. are an allegorical description of Microprosopus, the Son Deity, the V or Vau of the Tetragrammaton; Chapter XLIII. concerns the Judgments; XLIV., the Supernal Man; and XLV. is a Conclusion, in narrative form, of the passing away of three of the ten Rabbis, and the acknowledgment of R. Schimeon as chief of them all. Very much of this descriptive volume referring to Deity is not only abstruse, but is, to the modern European, verbiage run wild; yet in this characteristic it is truly Oriental and Hebrew; some passages remind me very much of the “Song of Solomon,” there are the same exuberant and flowery outbursts of poetic imagery. The “Idra Zuta,” or “Lesser Holy Assembly,” is a similar treatise, explanatory of the Holy powers of the Deity, ascribing honour and power to Macroprosopus, Microprosopus, AIMA the God Mother, and the Bride of God; with instructive allusions to the Prior Worlds of the so-called Edomite Kings, and the sexual aspects of Godhead. The work concludes with a narrative of the death of R. Schimeon and his burial, the whole “Idra” being his last dying declaration of doctrine.