It's lovely to see this thread surface from time to time with people's memories. There are some video clips on YouTube if you type "Roger Nicholson dulcimer" into the search box:

http://www.youtube.com/results?search_query=roger+nicholson+dulcimer&aq=f

A true gentleman. I was given his copy of Diana Poulton's biography of John Dowland as a momento, and it is is much treasured, both for its contents and for its connection with Roger. R.I.P. indeed.