Raymond Lully, born at Majorca in 1235, is said to have been a scholar of Roger Bacon, and to have written nineteen works on alchemy. Arnoldus de Villa Nova, born in 1235, amongst a number of works on this subject, wrote _The Rosarium_, a compendium of the alchemy of his time. He died in 1313, on his way to visit Pope Clement V. at Avignon. Another pope, John XXII., professed and described the art of transmuting metals, and boasts in the beginning of his book that he had made two hundred ingots of gold, each weighing one hundred pounds. Among English alchemists of the fourteenth century may be mentioned Cremer, abbot of Westminster (the disciple and friend of Lully), John Daustein, and Richard, who both practised and wrote upon the "hermetic philosophy," as it was termed. In the fifteenth century was born George Ripley, a canon registrar of Bridlington, who wrote the _Medulla Alchymiæ_ (translated by Dr. Salmon in his _Clavis_), and another work in rhyme, called "The Compound of Alchemie," which was dedicated to Edward IV. Dr. John Dee (born 1527), the warden of Manchester College, and his assistant, or "seer," Edward Kelly (born 1555), were both avowed alchemists. Dee wrote a _Treatise of the Rosie Crucian Secrets, their excellent methods of making Medicines and Metals_, &c. Ashmole says of him, that "some time he bestowed in vulgar chemistry, and was therein master of divers secrets: amongst others, he revealed to one Roger Cooke 'the great secret of the elixir' (as he called it) 'of the salt of metals, the projection whereof was one upon a hundred.'[13] "'Tis generally reported that Dr. Dee and Sir Edward Kelly were so strangely fortunate as to find a very large quantity of the elixir in some parts of the ruins of Glastonbury Abbey." It had remained here, perhaps, ever since the time of the highly gifted St. Dunstan, in the tenth century.[14] The great Lord Bacon relates the following story in his _Apothegms_:--