HE who hath attained the rank or degree of Exorcist, which we are usually accustomed to call Magus or Master according to grade, whensoever he desireth to undertake any operation, for the nine days immediately preceding the commencement of the work, should put aside from him all uncleanness, and prepare himself in secret during these days, and prepare all the things necessary, and in the space of these days all these should be made, consecrated, and exorcised. The which being duly completed…