With James Gillogly, founder of the Voynich Manuscript Mailing List in 1991.
Identified Sloane MS. 8 in the British Library as the Book of Soyga - the article can be found here .
Author of 'William F. Friedman's Transcription of the Voynich Manuscript'. Cryptologia XIX 1995, and 'John Dee and the Magic Tables in the Book of Soyga'.
See here  and here . (Checked October 2016)