Francis Barrett 
Lives of alchemystical philosophers 

Those unfamiliar with modern alchemical criticism, even if they have some acquaintance with the mystical labyrinth of the turba philosophorum , will probably learn with astonishment that the opinions of competent judges are divided not only upon the methods of the mysterious Hermetic science, but upon the object of alchemy itself. That it is concerned with transmutation is granted, but with the transmutation of metals, or of any physical substance, into material gold, is strenuously denied by a select section of reputable students of occultism. The transcendental theory of alchemy which they expound is steadily gaining favour, though the two text-books which at present represent it are both out of print and both exceedingly scarce.
In the year 1850 ‘A Suggestive Inquiry concerning the Hermetic Mystery and Alchemy, being an attempt to recover the Ancient Experiment of Nature, ‘ was published anonymously in London by a lady of high intellectual gifts, but was almost immediately withdrawn for reasons unknown, and which have given occasion, in consequence, to several idle speculations. This curious and meritorious volume, quaintly written in the manner of the
last century, originated the views which are in question and opened the controversy.