Edward Kelly a conlanger?

Hi all.

A friend recently sent me an email asking me about the Voynich
manuscript, and in formulating an answer I happened upon some
references to Edward Kelly, the putative author of the manuscript
and friend of John Dee.  Setting aside the question of whether that
manuscript is itself written in a conlang, he is said to have created
other languages as well. Does anyone know of any sources on this?

(This is an interesting question, because he would constitute to my
knowledge the third oldest example of a famous conlanger in world
history, after the brother of one of the Hellenistic diadochs and
much later Hildegard of Bingen.)

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Thomas Wier            "I find it useful to meet my subjects personally,
Dept. of Linguistics    because our secret police don't get it right
University of Chicago   half the time." -- octogenarian Sheikh Zayed of
1010 E. 59th Street     Abu Dhabi, to a French reporter.
Chicago, IL 60637