30 July - 9 September 1973. Edinburgh Arts 1973. Entrance to RDG, 8 Melville Crescent, Edinburgh. Arnold Herstand (President of Minneapolis College of Art, USA) with one of three blackboards created by Joseph Beuys during his Twelve Hour Lecture: A Homage to Anacharsis Cloots. Blackboard purchased in 1973 by Dayton's Gallery 12, Minneapolis.