Short answers, pulled from the story.
John Dee was born on the 13th of July 1527 in Tower Ward, London, and spent his early years in the Welsh Marches. His grandfather Bedo Ddu of Nant-y-groes lived in this region, and Dee constructed a family tree tracing his lineage back to Rhodri the Great.
John Dee was arrested in 1555 and charged with lewd and vain practices of calculating and conjuring. The charges escalated to treason against Queen Mary I because he had cast horoscopes for both Mary and Princess Elizabeth.
John Dee coined the term British Empire in his 1576 work The Title Royal of the British Empire. He advocated for English colonies abroad and asserted a formal claim to North America based on historical conquests by figures like Madog ab Owain Gwynedd and King Arthur.
Edward Kelley, also known as Edward Talbot, was a spiritual medium who met John Dee in 1582 and became his partner in supernatural pursuits. Kelley claimed to communicate with angels through a crystal and dictated several books to Dee in a special angelic or Enochian language.
John Dee died late in 1608 or early in 1609 at the age of 81 in poverty at Mortlake. His library was vandalised and many of his prized books and instruments were stolen after he returned to England in 1589.