As we have frequently to mention works of that "extraordinary Royalist, mystic and geomancer," John Heydon, who wrote so much respecting the Rosie Crucian Mysteries, and so loudly extolled the praises of the disciples, it will be advisable to present a sketch of his life as made by one Frederick Talbot, in the years 1662 and 1663, and attached to "Elhavareuna," or the "English Physitian's Tutor." He says John Heydon is not basely, but nobly descended. The Antiquaries derive them (his parents) from Julius Heydon the King of Hungary and Westphalia, that were descended from that Noble family of Caesar Heydon in Rome; and since in this Royal Race the line run down to the Honourable Sir Christopher Heydon, and Sir William Heydon, his brother of Heydon, neer Norwich; who married into Devonshire. Here the family flourished divers waies, to Sir John Heydon, late Lord Lieutenant of the King's Tower of London. And this Sir William Heydon had one sonne christened also William, and had two sons William and Francis, both born in Devon, at Poltimore House; Francis married one of the Noble Chandlers in Worcestershire of the Mother's side, which line spread by Marriage into Devonshire, among the Collins, Ducks, Drues and Bears, he had one Sister named Anne Heydon, who died two years since, his Father and Mother being yet living. He was born at his Father's house in Green-Arbour, London (his father having bestowed L1,500 upon those houses) and was baptised at St. Sepulchre's, and so was his Sister, and both in the fifth and seventh year of the Reign of King Charles the First; he was educated in Warwickshire among his mother's friends, and so careful were they to keep him and his sister from danger, and to their books, that he had one continually to wait upon him, both to school and at home, and so had his sister. He was commended by Mr. John Dennis, his Tutor in Tardebick, to Mr. George Linacre, Priest of Coughton, where he learned the Latin and Greek Tongues; the war at this time began to molest the Universities of this Nation, he was articled to Mr. Mic. Petley, an Attorney of Clifford Inne, with eighty pounds, that at five years' end he should be sworn an Attorney; now being very young he applied his mind to learning, and by his happy wit attained great knowledge in all arts and sciences, afterwards also he followed the Armies of the King, and for his valour commanded in the troops, when he was by these means famous for learning and arms, he travelled into Spain, Italy, Arabia, Egypt, and Persia, etc., and gave his mind to writing, and composed about seventeen years since, the Temple of Wisdom in three Books, The Holy Guide in six Books, Elhavareuna in one Book, Ocia Imperialia in one Book, the Idea of the Law, the Idea of Government, the Idea of Tyranny in three parts, the Fundamental Elements of Moral Philosophy, Policy, Government and War, etc.