Ebenezer Sibly (Sibley) wrote the original manuscript around the year 1800, translating its core from French but also writing many additions including a preface and the talisman designs. The text is entirely different from the Key of Solomon as translated and published by MacGregor Mathers. The occult bookseller John Denly sold Sibley’s manuscript for an extraordinary sum to the Duke of Wentworth but whilst in his possession he arranged for Frederick Hockley to make a copy. This copy was then copied by a youthful Robert Cross in 1868. At some point the copy made by Cross was acquired by Major Irwin, who placed his bookplate upon the preliminaries plus also a cut out of the catalogue description of the Hockley copy. The book offered here is a facsimile reproduction of Irwin's copy, also reproducing his bookplate and the catalogue entry. It should be noted that each individual sheet of the original is reproduced, and the book has been hand sewn in the same sections as the original. The original preface by Sibly presents a passionate argument for the nobility and efficacy of magic worked through spirits. He cites Jacob Boehme as an authority. Whilst the magic system presented involves the respectful conjuration of noble planetary spirits there is an implied acceptance of human foibles, with talismans for the promotion of amorous affairs and games of chance. That said, none are overtly negative. There is no cursing of your neighbours to be found. The ones for good fortune in military affairs reflect the Napoleonic Wars then raging. Curiously there is one for protection against and freedom from slavery. The magic described is a curious mix. The exposition of planetary hours, magic squares and so forth being quite mainstream and scholarly, whilst other aspects are of the nature of folk magic. The incenses are not entirely vegetarian but rather involve a curious mixture of body parts of various wild animals in addition to plants. The astrological considerations involve some star lore mixed with folk magic elements. In addition, some named Jewish Cabalists are cited as an authority. Whilst the writers all consider the magic to be consistent with Christianity, and Christian powers are invoked, it is not in the Catholic Ecclesiastical Underground tradition of the Grimoire of Pope Honorius or the Grimoire of the Spirit of the Place. In these works infernal beings are compelled to appear and obey by means of Christian powers. In Sibley’s Clavis of Solomon the powers invoked are noble spirits which are respectfully invoked. Additional short works are appended to the original Sibley text: "The Mysterious Ring," "An experiment of the spirit Birto," "An experiment of the spirit Vassago," "An experiment of the spirit Agares," "Of the Spirit Bealphoras," and "The Wheel of Wisdom."