The year 2008 marked the fortieth anniversary of Reunion, a performance in which games of chess determined the form and acoustical ambience of a musical event. The concert – held at the Ryerson Theatre in Toronto, Canada – began shortly after 8:30 on the evening of March 5, 1968, and concluded at approximately 1:00 a.m. the next morning. Principal players were John Cage, who conceived (but did not actually “compose”) the work; Marcel Duchamp and his wife Alexina (Teeny); and composers David Behrman, Gordon Mumma, David Tudor, and Lowell Cross. Except for a brief curtain call with Merce Cunningham and Dance Company in Buffalo, NY five days later (March 10, 1968), Duchamp made his last public stage appearance – in the role of chess master – in Reunion.