Yep, it's a fantastic resource. It seems that he recently started improving the resolutions of the images in his alchemical emblem collection too, which was my biggest problem with the site in the past.
Thanks for that, I'll change the link. It's a fantastic paper and Harkness's book length study of John Dee is even better. I was actually planning on doing my PhD work on Dee until I read it and realized that the book I wanted to write pretty much already existed:
One of the things I find so fascinating about him is that he was also one of the leading English mathematicians of his generation (his "Mathematical Preface" to the first English edition of Euclid would've made him important even without any of the magic/occult stuff) and according to one book historian he also had one of the largest private libraries in all of Europe. So he's important as a Renaissance polymath and not just as someone who thought they were channelling sprits. Which in turn sheds light on why someone like Newton would have a similar range of interests. The British imperial stuff was going to be my focus though, because of the fact that he was an original partner with Sir Walter Raleigh in his attempts to settle colonies in the New World. Plus (along with Merlin) he's essentially the archetype of the wizard in pop culture!