Bob, That dates back to late 1993 or early 1994. He was supposed to be my collaborator but that never worked out. Not his fault. We were/are good friends until he retired last year. He was the lead instructor for the last 15 years or so of the Materials and Processes of Photography course designed by Stroebel and others. You can read a bit about him at: http://www.rit.edu/~andpph/giants/2004-retirement.html I miss his presence on the faculty, andy
