There is a picture somewhere of a thumb or finger attachment. It might be this one, but it is not clear enough, and looks like the left hand - the picture may be the wrong way around: http://www.vanedwards.co.uk/spencer/html/Page%20415.html
Rob MacKillop -- To get on or off this list see list information at http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html