The first edition of this little book has been long out of print, and for several years, I have been asked to enlarge it, but until the present time sufficient leisure has not been found to collect the additional matter which seemed desirable. This essay on Numbers now appears as Volume IX of my Series entitled "Collectanea Hermetica," of which it seem to form a suitable part, and I am hopeful that it maybe as well received by students of mystic philosophy as the previous volumes which treated of Alchemy, in the Hermetic Arcanum, Hermetic Art, Euphrates and Aesch Metzareph; the Dream of Scipio and the Golden verses of the Pythagoreans, the Pymander of Hermes and Egyptian Magic.