JOHN HEYDON.
This mountebank royalist mystic has no claim to be included among alchemical philosophers, and is only noticed here to advise students that everything relating to alchemy in the whole of his so-called works was impudently stolen from Philalethes. He practised wholesale piracy on his contemporaries and on ancient authors with equal effrontery. The account of his voyage to the land of the Rosicrucians is a mangled version of Bacon’s “Atlantis;” his apologues, epilogues, enigmas, &c., are also stolen goods; in short, whatever is of value in his books is matter borrowed from the highways and byways of occultism, and heaped indiscriminately together. Everything emanating from his own weakly intelligence is utterly contemptible; he was grossly superstitious and pitiably credulous, as may be seen by his medical recipes. He claimed a familiar acquaintance with the most arcane Rosicrucian mysteries, and pretended that he had visited the temples, holy houses, castles, and invisible mountains of the Fraternity. Of all the alchemical liars and of all mystical charlatans who have flourished in England since the first days of Anglo-occultism, John Heydon is chief.