patents. The practical common-sense of Englishmen never took very kindly to the alchemical delusion, and Chaucer very faithfully describes the contempt with which it was generally regarded. Enthusiasts there were, no doubt, who firmly believed in it, and knaves who made a profit out of it, and dupes who were preyed upon by the knaves; and so it languished on through the sixteenth and seventeenth centuries. It seems at one time to have amused the shrewd intellect of Queen Elizabeth, and at another to have caught the volatile fancy of the second Villiers, Duke of Buckingham. But alchemy was, in the main, the modus vivendi of quacks and cheats, of such impostors as Ben Jonson has drawn so powerfully in his great comedy—a Subtle, a Face, and a Doll Common, who, in the Sir Epicure Mammons of the time, found their appropriate victims. These creatures played on the greed and credulity of their dupes with successful audacity, and excited their imaginations by extravagant promises. Thus, Ben Jonson’s hero runs riot with glowing anticipations of what the alchemical magisterium can effect.