A 16th-century portrait by an unknown artist
|Born||13 July 1527|
|Died||December 1608 or March 1609 (age 81)|
Mortlake, Surrey, England
|Alma mater||St John's College, Cambridge|
|Known for||Advisor to Queen Elizabeth I|
|Fields||Mathematics, alchemy, astrology, Hermeticism, navigation,|
|Institutions||Trinity College, Cambridge|
Christ's College, Manchester
|Academic advisors||Gemma Frisius, Gerardus Mercator|
|Notable students||Thomas Digges|
John Dee (13 July 1527 – 1608 or 1609) was an Anglo-Welsh mathematician, astronomer, astrologer and occult philosopher, and an advisor to Queen Elizabeth I. He spent much time on alchemy, divination, and Hermetic philosophy. He also advocated turning England's imperial expansion into a "British Empire", a term he is generally credited with coining. To 21st-century eyes, Dee's activities straddle the worlds of magic and modern science, but the distinction would have meant nothing to him. He was invited to lecture on Euclidean geometry at the University of Paris while still in his early twenties. He was an ardent promoter of mathematics, a respected astronomer and a leading expert in navigation, who trained many who would conduct England's voyages of discovery. Meanwhile he immersed himself in sorcery, astrology and Hermetic philosophy. Much effort in his last 30 years went into trying to commune with angels, so as to learn the universal language of creation and achieve a pre-apocalyptic unity of mankind. A student of the Renaissance Neo-Platonism of Marsilio Ficino, he drew no distinctions between his mathematical research and his investigations of hermetic magic, angel summoning and divination: all his activities were facets of the quest for a transcendent understanding of the divine forms underlying the visible world, Dee's "pure verities". He amassed one of the biggest libraries in England. His scholarly status also took him into Elizabethan politics as an adviser and tutor to Elizabeth I and through relations with her ministers Francis Walsingham and William Cecil. He tutored and had patronage relations with Sir Philip Sidney, his uncle Robert Dudley, 1st Earl of Leicester, Edward Dyer, and Sir Christopher Hatton.
- 1 Biography
- 2 Personal life
- 3 Achievements
- 4 Reputation and significance
- 5 Literary and cultural references
- 6 See also
- 7 Notes
- 8 References
- 9 External links
Dee was born in Tower Ward, London, to Rowland Dee, of Welsh descent, and Johanna Wild. His surname "Dee" derived from the Welsh du (black); his grandfather was Bedo Ddu of Nant-y-groes, Pilleth, Radnorshire, and John retained his connection with the locality. His father Roland was a mercer and gentleman courtier to Henry VIII. John Dee claimed to be a descendant of Rhodri the Great, Prince of Wales and constructed a pedigree showing his descent from Rhodri. Dee's family arrived in London in the wake of Henry Tudor's coronation as Henry VII. Jane Dee was the daughter of William Wild.
Dee attended the Chelmsford Chantry School (now King Edward VI Grammar School) from 1535 to 1542. He entered St John's College, Cambridge, in November 1542, aged 15, graduating BA in 1545 or early 1546. His abilities recognised, he became an original fellow of Trinity College, Cambridge, on its founding by Henry VIII in 1546. At Trinity, the clever stage effects he produced for a production of Aristophanes' Peace procured him the reputation of being a magician that clung to him through life. In the late 1540s and early 1550s, he travelled in Europe, studying at Louvain (1548) and Brussels and lecturing in Paris on Euclid. He studied with Gemma Frisius and became a close friend of the cartographer Gerardus Mercator and cartographer Abraham Ortelius. Dee also travelled extensively throughout Europe meeting and working with as well as learning from other leading continental mathematicians such as Federico Commandino in Italy. He returned to England with an important collection of mathematical and astronomical instruments. In 1552, he met Gerolamo Cardano in London: during their acquaintance they investigated a purported perpetual motion machine, as well as a gem supposed to have magical properties.
Rector at Upton-upon-Severn from 1553, Dee was offered a readership in mathematics at Oxford University in 1554, which he declined, citing English universities' emphasis on rhetoric and grammar (which, together with logic, formed the academic trivium) over philosophy and science (the more advanced quadrivium, composed of arithmetic, geometry, music and astronomy), as offensive. He was occupied with writing and perhaps hoped for a better position at court. In 1555, Dee became a member of the Worshipful Company of Mercers, as his father had, through the company's system of patrimony.
That same year, 1555, he was arrested and charged with "calculating" for having cast horoscopes of Queen Mary and Princess Elizabeth; the charges were expanded to treason against Mary. Dee appeared in the Star Chamber and exonerated himself, but was turned over to the Catholic Bishop Bonner for religious examination. His strong and lifelong penchant for secrecy perhaps worsening matters, this entire episode was only the most dramatic in a series of attacks and slanders that would dog Dee throughout his life. Clearing his name yet again, he soon became a close associate of Bonner.
Dee presented Queen Mary with a visionary plan for the preservation of old books, manuscripts and records and the founding of a national library, in 1556, but his proposal was not taken up. Instead, he expanded his personal library at his house in Mortlake, tirelessly acquiring books and manuscripts in England and on the European Continent. Dee's library, a centre of learning outside the universities, became the greatest in England and attracted many scholars.
When Elizabeth took the throne in 1558, Dee became her trusted advisor on astrological and scientific matters, choosing Elizabeth's coronation date himself. From the 1550s through the 1570s, he served as an advisor to England's voyages of discovery, providing technical assistance in navigation and ideological backing in the creation of a "British Empire", a term that he was the first to use. Dee wrote a letter to William Cecil, 1st Baron Burghley, in October 1574 seeking patronage. He claimed to have occult knowledge of treasure in the Welsh Marches, and of valuable ancient manuscripts kept at Wigmore Castle, knowing that the Lord Treasurer's ancestors came from this area. In 1577, Dee published General and Rare Memorials pertayning to the Perfect Arte of Navigation, a work that set out his vision of a maritime empire and asserted English territorial claims on the New World. Dee was acquainted with Humphrey Gilbert and was close to Sir Philip Sidney and his circle.
In 1564, Dee wrote the Hermetic work Monas Hieroglyphica ("The Hieroglyphic Monad"), an exhaustive Cabalistic interpretation of a glyph of his own design, meant to express the mystical unity of all creation. Having dedicated it to Maximilian II, Holy Roman Emperor in an effort to gain patronage, Dee attempted to present it to him during the time of his ascension to the throne of Hungary. This work was esteemed by many of Dee's contemporaries, but the work can not be interpreted today without the secret oral tradition from that era.
He published a "Mathematical Preface" to Henry Billingsley's English translation of Euclid's Elements in 1570, arguing the central importance of mathematics and outlining mathematics' influence on the other arts and sciences. Intended for an audience outside the universities, it proved to be Dee's most widely influential and frequently reprinted work.
One of the important early products of the English School was the first English translation of the Elements of Euclid. This translation was carried out by The Lord Mayor of London Sir Henry Billingsley and not from a Latin translation but direct from the Greek. Published in 1570 this mathematical milestone contained a preface as well as copious notes and supplementary material from John Dee and this preface is considered to be one of Dee's most important mathematical works.
By the early 1580s, Dee was growing dissatisfied with his progress in learning the secrets of nature as well as his failing influence and recognition in court circles. Failure of his proposed calendar revision, imperial recommendations and ambivalent results from exploration of North America had nearly brought his hopes of political patronage to an end. As a result, he began a more energetic turn towards the supernatural as a means to acquire knowledge. Specifically, he sought to contact spirits through the use of a "scryer" or crystal-gazer, which would act as an intermediary between Dee and the angels.
Dee's first attempts with several scryers were not satisfactory, but in 1582 he met Edward Kelley (then going under the name of Edward Talbot to disguise his conviction for "coining" or forgery), who impressed him greatly with his abilities. Dee took Kelley into his service and began to devote all his energies to his supernatural pursuits. These "spiritual conferences" or "actions" were conducted with an air of intense Christian piety, always after periods of purification, prayer and fasting. Dee was convinced of the benefits they could bring to mankind. (The character of Kelley is harder to assess: some have concluded that he acted with complete cynicism, but delusion or self-deception are not out of the question. Kelley's "output" is remarkable for its sheer volume, its intricacy and its vividness). Dee maintained that the angels laboriously dictated several books to him this way, through Kelley, some in a special angelic or Enochian language.
In 1583, Dee met the visiting impoverished yet popular Polish nobleman Albert Łaski who, after overstaying his welcome at court, invited Dee to accompany him on his return to Poland. With some prompting by the "angels" (again through Kelley) and his worsening status at court, Dee was persuaded to go. Dee, Kelley and their families left for the Continent in September 1583, but Łaski proved to be bankrupt and out of favour in his own country. Dee and Kelley began a nomadic life in Central Europe, meanwhile continuing their spiritual conferences, which Dee recorded meticulously in his diaries and almanacs. They had audiences with Emperor Rudolf II in Prague Castle and King Stefan Batory of Poland whom they attempted to convince of the importance of angelic communication. The meeting with the Polish King, Stefan Batory, took place at the royal castle at Niepołomice (near Kraków, then the capital of Poland) and was later widely analyzed by Polish historians (Ryszard Zieliński, Roman Żelewski, Roman Bugaj) and writers (Waldemar Łysiak). While generally Dee was accepted as a man of wide and deep knowledge, they mistrusted his connection with the English monarch, Elizabeth I. They could not be sure that their meetings were without political ramifications. Some thought (and still do) that Dee was in fact a spy for the English monarch. Nevertheless, the Polish king, a devout Catholic and very cautious of supernatural media, began their meeting(s) with the affirmation that any prophetic revelations must be in keeping with the teachings of Jesus Christ, the mission of the Holy Catholic Church, and the approval of the Pope.
In 1587, during a spiritual conference in Bohemia, Kelley informed Dee that the angel Uriel had ordered the men to share all their possessions, including their wives. By this time, Kelley had gained some renown as an alchemist and in fact was more sought-after than Dee in this regard: this was a line of work that had prospects for serious and long-term financial gain, especially among the royal families of central Europe. Dee, on the other hand, was more interested in communicating with the angels who he believed would help him solve the mysteries of the heavens through mathematics, optics, astrology, science and navigation. It may be that Kelley in fact wished to end Dee's dependence on him as a scryer for their increasingly lengthy and frequent spiritual conferences. The order for wife-sharing caused Dee great anguish, but he apparently did not doubt its genuineness. They apparently did share wives. However, Dee broke off the conferences immediately afterwards. Dee returned to England in 1589: Kelley went on to be the alchemist for Emperor Rudolf II. Nine months later, on 28 February 1588, a son was born to Dee's wife, whom Dee baptised Theodorus Trebonianus Dee and raised as his own. It is possible that this child was Kelley's; Dee was 60 at the time, Edward Kelley was 32.
Dee returned to Mortlake after six years abroad to find his home vandalized, his library ruined and many of his prized books and instruments stolen. Furthermore, Dee found that increasing criticism of occult practices had made England even more inhospitable to his magical practices and natural philosophy. Dee sought support from Elizabeth, who hoped he could persuade Kelley to return and ease England's economic burdens through alchemy. She finally appointed Dee Warden of Christ's College, Manchester, in 1595. This former College of Priests had been re-established as a Protestant institution by a Royal Charter of 1578.
However, he could not exert much control over the Fellows of that College, who despised or cheated him. Early in his tenure, he was consulted on the demonic possession of seven children, but took little interest in the matter, although he did allow those involved to consult his still extensive library.
He left Manchester in 1605 to return to London. However, he remained Warden until his death. By that time, Elizabeth was dead, and James I provided no support. Dee spent his final years in poverty at Mortlake, forced to sell off various of his possessions to support himself and his daughter, Katherine, who cared for him until the end. He died in Mortlake late in 1608 or early 1609 aged 81. There are no extant records of the exact date as both the parish registers and Dee's gravestone are missing. In 2013 a memorial plaque to Dee was placed on the south wall of the present church.
Dee was married three times and had eight children. He first married Katherine Constable in 1565; she died in 1574 and their union resulted in no children. His second (also childless) marriage to an unknown woman lasted only a year until her death in 1576. From 1577 to 1601, Dee kept a sporadic diary (also referred to as his "almanac") from which most of what we know about his life during that time has been gleaned. In 1578 he married the 23-year-old Jane Fromond: Dee was 51 at the time. Jane had her own connections to the Elizabethan court: she was a lady in waiting to Elizabeth FitzGerald, Countess of Lincoln, a position she gave up when she married Dee. When in 1587, Kelley informed Dee of the angel's wish that they share wives, Jane Dee (née Fromond) was the wife Dee shared with him. Although Dee complied with the angel's supposed request for a while, he was apparently distressed by the arrangement and it was one reason why the two men parted company not long thereafter. Some believe that Dee's son Theodore, born nine months later, could have been Kelley's son, not Dee's.
Jane died in Manchester of the bubonic plague and was buried in the Manchester Cathedral burial grounds in March 1604. Michael, born in Prague, died on his father's birthday in 1594. Theodore, born in Třeboň, died in Manchester in 1601. His sons Arthur Dee and Rowland survived him, as did his daughter Katherine "who was his companion to the end". No records exist for his youngest daughters Madinia (sometimes Madima), Frances and Margaret after 1604, so it is widely assumed they died in the same epidemic that took their mother. (Dee had by this time ceased keeping his diary).
While Arthur was a student at the Westminster School, Dee wrote a letter to his headmaster echoing the normal worries of boarding school parents. Arthur was an apprentice in much of his father's alchemical and scientific work, and was in fact often his scryer until Kelley came along. Arthur went on to become an alchemist and hermetic author, whose works were published by Elias Ashmole.
As regards Dee's physical appearance, the antiquary John Aubrey gives the following description: "He was tall and slender. He wore a gown like an artist's gown, with hanging sleeves, and a slit.... A very fair, clear sanguine complexion... a long beard as white as milk. A very handsome man."
Dee was heavily influenced by the Hermetic and Platonic-Pythagorean doctrines that were pervasive in the Renaissance. He believed that numbers were the basis of all things and the key to knowledge. From Hermeticism, he drew the belief that man had the potential for divine power, and he believed this divine power could be exercised through mathematics. His ultimate goal was to help bring forth a unified world religion through the healing of the breach of the Roman Catholic and Protestant churches and the recapture of the pure theology of the ancients.
Advocacy of English expansion
From 1570 Dee advocated a policy of political and economic strengthening of England and imperial expansion into the New World. In his manuscript, Brytannicae reipublicae synopsis (1570), he outlined the current state of the Elizabethan Realm and was concerned with trade, ethics and national strength.
His 1576 General and Rare Memorials pertayning to the Perfect Arte of Navigation was the first volume in an unfinished series planned to advocate the rise of imperial expansion. In the highly symbolic frontispiece, Dee included a figure of Britannia kneeling by the shore beseeching Elizabeth I, to protect her empire by strengthening her navy. Dee used Geoffrey's inclusion of Ireland in Arthur's imperial conquests to argue that Arthur had established a 'British empire' abroad. He further argued that England exploit new lands through colonisation and that this vision could become reality through maritime supremacy. Dee has been credited with the coining of the term British Empire, however, Humphrey Llwyd has also been credited with the first use of the term in his Commentarioli Britannicae Descriptionis Fragmentum, published eight years earlier in 1568.
Dee posited a formal claim to North America on the back of a map drawn in 1577–80; he noted Circa 1494 Mr Robert Thorn his father, and Mr Eliot of Bristow, discovered Newfound Land. In his Title Royal of 1580, he invented the claim that Madog ab Owain Gwynedd had discovered America, with the intention of ensuring that England's claim to the New World was stronger than that of Spain. He further asserted that Brutus of Britain and King Arthur as well as Madog had conquered lands in the Americas and therefore their heir Elizabeth I of England had a priority claim there.
Reputation and significance
About ten years after Dee's death, the antiquarian Robert Cotton purchased land around Dee's house and began digging in search of papers and artifacts. He discovered several manuscripts, mainly records of Dee's angelic communications. Cotton's son gave these manuscripts to the scholar Méric Casaubon, who published them in 1659, together with a long introduction critical of their author, as A True & Faithful Relation of What passed for many Yeers between Dr. John Dee (A Mathematician of Great Fame in Q. Eliz. and King James their Reignes) and some spirits. As the first public revelation of Dee's spiritual conferences, the book was extremely popular and sold quickly. Casaubon, who believed in the reality of spirits, argued in his introduction that Dee was acting as the unwitting tool of evil spirits when he believed he was communicating with angels. This book is largely responsible for the image, prevalent for the following two and a half centuries, of Dee as a dupe and deluded fanatic. Around the same time the True and Faithful Relation was published, members of the Rosicrucian movement claimed Dee as one of their number. There is doubt, however, that an organized Rosicrucian movement existed during Dee's lifetime, and no evidence that he ever belonged to any secret fraternity. Dee's reputation as a magician and the vivid story of his association with Edward Kelley have made him a seemingly irresistible figure to fabulists, writers of horror stories and latter-day magicians. The accretion of false and often fanciful information about Dee often obscures the facts of his life, remarkable as they are in themselves. It also does nothing to promote his Christian leanings: Dee looked to the angels to speak to him about how he might heal the very deep and serious rifts between the Roman Catholic Church, the Reformed Church of England and the Protestant movement in England. Queen Elizabeth I used him as her court astronomer on a number of occasions not solely because he practised Hermetic arts, but because he was a deeply religious and learned man whom she trusted.
A revaluation of Dee's character and significance came in the 20th century, largely as a result of the work of the historians Charlotte Fell Smith and Dame Frances Yates. Both writers brought into focus the parallel roles magic, science and religion held in the Elizabethan Renaissance. Fell Smith writes: "There is perhaps no learned author in history who has been so persistently misjudged, nay, even slandered, by his posterity, and not a voice in all the three centuries uplifted even to claim for him a fair hearing. Surely it is time that the cause of all this universal condemnation should be examined in the light of reason and science; and perhaps it will be found to exist mainly in the fact that he was too far advanced in speculative thought for his own age to understand."  As a result of this and subsequent re-evaluation, Dee is now viewed as a serious scholar and book-collector, a devoted Christian (albeit during a very confusing time for that faith), an able scientist, and one of the most learned men of his day. His personal library at Mortlake was the largest in the country (before it was vandalized), and was created at enormous and sometimes ruinous personal expense; it was considered one of the finest in Europe, perhaps second only to that of De Thou. As well as being an astrological and scientific advisor to Elizabeth and her court, he was an early advocate of the colonisation of North America and a visionary of a British Empire stretching across the North Atlantic.
Dee promoted the sciences of navigation and cartography. He studied closely with Gerardus Mercator, and he owned an important collection of maps, globes and astronomical instruments. He developed new instruments as well as special navigational techniques for use in polar regions. Dee served as an advisor to the English voyages of discovery, and personally selected pilots and trained them in navigation. He believed that mathematics (which he understood mystically) was central to the progress of human learning. The centrality of mathematics to Dee's vision makes him to that extent more modern than Francis Bacon, though some scholars believe Bacon purposely downplayed mathematics in the anti-occult atmosphere of the reign of James I. It should be noted, though, that Dee's understanding of the role of mathematics is radically different from our contemporary view. Dee's promotion of mathematics outside the universities was an enduring practical achievement. As with most of his writings, Dee chose to write in English, rather than Latin, to make his writings accessible to the general public. His "Mathematical Preface" to Euclid was meant to promote the study and application of mathematics by those without a university education, and was very popular and influential among the "mecanicians": the new and growing class of technical craftsmen and artisans. Dee's preface included demonstrations of mathematical principles that readers could perform themselves without special education or training.
During the 20th century, the Municipal Borough of Richmond (now the London Borough of Richmond upon Thames) honoured John Dee by naming a street near Mortlake, where he lived, "Dee Road" after him.
Dee was a friend of Tycho Brahe and was familiar with the work (translated into English by his ward and assistant, Thomas Digges) of Nicolaus Copernicus. Many of his astronomical calculations were based on Copernican assumptions, but he never openly espoused the heliocentric theory. Dee applied Copernican theory to the problem of calendar reform. In 1583, he was asked to advise the Queen about the new Gregorian calendar that had been promulgated by Pope Gregory XIII from October 1582. His advice was that England should accept it, albeit with seven specific amendments. The first of these was that the adjustment should not be the 10 days that would restore the calendar to the time of the Council of Nicaea in 325 AD, but by 11 days, which would restore it to the birth of Christ. Another proposal of Dee's was to align the civil and liturgical years, and to have them both start on 1 January. Perhaps predictably, England chose to spurn any suggestions that had papist origins, despite any merit they may objectively have, and Dee's advice was rejected.
He has often been associated with the Voynich manuscript. Wilfrid Michael Voynich, who bought the manuscript in 1912, suggested that Dee may have owned the manuscript and sold it to Rudolph II. Dee's contacts with Rudolph were far less extensive than had previously been thought, however, and Dee's diaries show no evidence of the sale. Dee was, however, known to have possessed a copy of the Book of Soyga, another enciphered book.
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- Monas Hieroglyphica, 1564
- Preface to Billingsley's Euclid (Billingsley's translation of Euclid's Elements), 1570
- General and Rare Memorials pertayning to the Perfect Arte of Navigation, 1577
- On the Mystical Rule of the Seven Planets, 1582–1583
- Dee's Speculum or Mirror (an obsidian Aztec cult object in the shape of a hand-mirror, brought to Europe in the late 1520s), which was subsequently owned by Horace Walpole. Jennifer Rampling has claimed that Dee never actually owned this object. The item now residing in the British Museum was first attributed to Dee by Horace Walpole. Lord Frederick Campbell had brought "a round piece of shining black marble in a leathern case" to Walpole in an attempt to ascertain the object's provenance. According to Walpole, he responded saying "Oh, Lord, I am the only man in England that can tell you! It is Dr. Dee's black stone". There is no explicit reference to the mirror in any of Dee's surviving writings. The provenance of the Museum's obsidian speculum, as well as the crystal ball, is in fact dubious.
- The small wax seals used to support the legs of Dee's "table of practice" (the table at which the scrying was performed).
- The large, elaborately decorated wax "Seal of God", used to support the "shew-stone", the crystal ball used for scrying.
- A gold amulet engraved with a representation of one of Kelley's visions.
- A crystal globe, 6 cm in diameter. This item remained unnoticed for many years in the mineral collection; possibly the one owned by Dee, but the provenance of this object is less certain than that of the others.
In December 2004, both a shew stone (a stone used for scrying) formerly belonging to Dee and a mid-17th century explanation of its use written by Nicholas Culpeper were stolen from the Science Museum in London; they were recovered shortly afterwards.
Literary and cultural references
Dee was a popular figure in literary works written by his contemporaries, and he has continued to feature in popular culture ever since, particularly in fiction or fantasy set during his lifetime or that deals with magic or the occult.
16th and 17th centuries
- Edmund Spenser may be referring to Dee in The Faerie Queene (1596).
- William Shakespeare may have modelled the character of Prospero in The Tempest (1610–11) on Dee.
- William Harrison Ainsworth includes Dee as a character in his 1840 novel Guy Fawkes.
- Dee is the subject of Henry Gillard Glindoni's painting John Dee performing an experiment before Queen Elizabeth I.
- John Dee, and his fictional modern descendant Baron Mueller, are the main characters in Gustav Meyrink's 1927 novel The Angel of the West Window (original German title: Der Engel vom westlichen Fenster).
- The early twentieth century horror author H. P. Lovecraft mentions Dee as one of the translators of the fictional book Al Azif (commonly known as the Necronomicon) in his short fictional essay, History of the Necronomicon, which reads: "An English translation made by Dr. Dee was never printed, and exists only in fragments recovered from the original manuscript."
- John Dee is one of the main characters of Peter Ackroyd's 1993 novel The House of Doctor Dee.
- John Dee appears as the plot's main antagonist "the Walker" in Charlie Fletcher's book Stoneheart (2006)
- Dr John Dee serves as a main character in The Secrets of the Immortal Nicholas Flamel series by Michael Scott (2007–2012). He is an English magician and necromancer.
- Phil Rickman casts John Dee as the main detective, investigating the disappearance of the bones of King Arthur during the reign of Elizabeth I in the historical mystery The Bones of Avalon (2010).
- The play Burn Your Bookes (2010) by Richard Byrne examines the relationship between John Dee, Edward Kelley and Edward Dyer.
- The opera Dr Dee: An English Opera, written by Damon Albarn, explores Dee's life and work. It was premiered at the Palace Theatre in Manchester on 1 July 2011 and opened at the London Coliseum as part of the London 2012 Festival for the Cultural Olympiad in June 2012.
- According to Charlotte Fell Smith, this portrait was painted when Dee was 67. It belonged to grandson Rowland Dee and later to Elias Ashmole, who left it to Oxford University.
- Benjamin Woolley (2012), The Queen's Conjuror, HarperCollins UK, p. 3, ISBN 9780007401062
- John Dee at the Mathematics Genealogy Project
- "British Society for the History of Mathematics". Dcs.warwick.ac.uk. Archived from the original on 16 May 2010. Retrieved 2 April 2010.
- Roberts, R. Julian (2006) . "Dee, John (1527–1609)". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/7418.(Subscription or UK public library membership required.)
- Gwyn A. Williams, When Was Wales? A History of the Welsh (London: Penguin, 1985), p. 124.
- "Blogs – Wales – John Dee, magician to Queen Elizabeth". BBC. 18 December 2010.
- Jones and Chambers 1959.
- "Dee biography". History.mcs.st-andrews.ac.uk. Retrieved 6 October 2012.
- "Welsh Journals Online". Welshjournals.llgc.org.uk. Retrieved 6 October 2012.
- Poole, Robert. "John Dee and the English Calendar: Science, Religion and Empire". The Institute of Historical Research. Archived from the original on 13 June 2011.
- Fell Smith, Charlotte (1909). John Dee: 1527–1608. London: Constable and Company. p. 15. ISBN 9781291940411. Retrieved 31 December 2015.
- Fell Smith, Charlotte (1909). John Dee: 1527–1608. London: Constable and Company. pp. 15 & 16. ISBN 9781291940411. Retrieved 31 December 2015.
- "A true & faithful relation of what passed for many yeers between Dr John Dee... and some spirits (London, 1659)". St John's College, Cambridge. 2014. Retrieved 31 December 2015.
- Fell Smith, Charlotte (1909). John Dee: 1527–1608. London: Constable and Company. p. 15. ISBN 9781291940411. Retrieved 31 December 2015.
- Christie, Thony (13 July 2013). "John Dee, the 'Mathematicall Praeface' and the English School of Mathematics". The Renaissance Mathematicus. Retrieved 9 August 2019.
- Gerolamo Cardano (trans. by Jean Stoner) (2002). De Vita Propria (The Book of My Life). New York: New York Review of Books. viii.
- Fell Smith, Charlotte (1909). John Dee: 1527–1608. London: Constable and Company.
- Julian Roberts, ed. (2005). "A John Dee Chronology, 1509–1609". Renaissance Man: The Reconstructed Libraries of European Scholars: 1450–1700 Series One: The Books and Manuscripts of John Dee, 1527–1608. Adam Matthew Publications. Archived from the original on 20 July 2008. Retrieved 27 October 2006.
- "Mortlake". The Environs of London: County of Surrey. 1: 364–88. 1792. Retrieved 27 October 2006.
- "Books owned by John Dee". St. John's College, Cambridge. Retrieved 26 October 2006.
- Dr. Robert Poole (6 September 2005). "John Dee and the English Calendar: Science, Religion and Empire". Institute of Historical Research. Archived from the original on 30 September 2007. Retrieved 26 October 2006.
- Szönyi, György E. (2004). "John Dee and Early Modern Occult Philosophy". Literature Compass. 1 (1): 1–12.
- John Strype, Annals of the Reformation, Oxford (1824), vol.ii, part ii, no. XLV, 558–563
- Forshaw, Peter J. (2005). "The Early Alchemical Reception of John Dee's Monas Hieroglyphica". Ambix. Maney Publishing. 52 (3): 247–269. doi:10.1179/000269805X77772.
- "John Dee (1527–1608): Alchemy – the Beginnings of Chemistry" (PDF). Museum of Science and Industry in Manchester. 2005. Archived from the original (PDF) on 28 September 2006. Retrieved 26 October 2006. Cite uses deprecated parameter
- Stephen Johnston (1995). "The identity of the mathematical practitioner in 16th-century England". Museum of the History of Science, Oxford. Retrieved 27 October 2006.
- Frank Klaassen (August 2002). "John Dee's Conversations with Angels: Cabala, alchemy, and the end of nature". Canadian Journal of History.
- Calder, I. R. F. (1952). "John Dee Studied as an English Neo-Platonist". University of London. Retrieved 26 October 2006.
- "Dee, John". Encyclopædia Britannica. Encyclopædia Britannica Online. 2006. Retrieved 27 October 2006.
- Meric Casaubon. A True & Faithful Relation of What passed for many Yeers between Dr. John Dee (A Mathematician of Great Fame in Q. Eliz. and King James their Reignes) and some spirits. New York: Magickal Childe Pub. ISBN 0-939708-01-9.
- Dee, John. Quinti Libri Mysteriorum. British Library.
- Mackay, Charles (1852). "4". Memoirs of Extraordinary Popular Delusions and the Madness of Crowds. London: Office of the National Illustrated Library.
- "History of the Alchemy Guild". International Alchemy Guild. Archived from the original on 28 February 2009. Retrieved 26 October 2006.
- “Although it is indeed probable that Kelly was more accomplished and also more devoted to pursuing the way of transmuting base metals to gold, his master approached alchemy in a more subtle and complex way. He did not stand next to the furnace and the alembic day and night, but in his diaries he documented his practical experiments.”Szőnyi, György E. (2015). "'Layers of Meaning in Alchemy in John Dee's Monas hieroglyphica and its Relevance in a Central European Context'" (PDF). Centre for Renaissance Texts, 2015, 100.
- Dee, John (1842) Diary. Manchester: Chetham Society; p. 33.
- "John Dee". Encyclopædia Britannica (11th ed.). London: Cambridge University Press. 1911.
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|Wikisource has the text of the 1911 Encyclopædia Britannica article Dee, John.|
- Works by John Dee at Project Gutenberg
- Works by or about John Dee at Internet Archive
- The Private Diary of Dr. John Dee, and the Catalogue of His Library of Manuscripts Full view book with PDF download at Google Books
- The Private Diary of Dr. John Dee, and the Catalogue of His Library of ... with James Orchard Full view book with PDF download at Internet Archive
- The Calls of Enoch with Edward Kelley Full view book at Google Books
- John Dee reports of Dee and Kelley's conversations with Angels edited in PDF by Clay Holden: Mysteriorum Liber Primus (with Latin translations), Notes to Liber Primus by Clay Holden, Mysteriorum Liber Secundus, Mysteriorum Liber Tertius
- The J.W. Hamilton-Jones translation of Monas Hieroglyphica from Twilit Grotto: Archives of Western Esoterica
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- Forshaw, Peter, 'The Hermetic Frontispiece: Contextualising John Dee's Hieroglyphic Monad', Ambix, Vol. 64:1 (2017)
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