1981. R-L: Panza, Cladders, Spens, Macmillan. Scottish National Gallery of Modern Art, Edinburgh.
August/ September 1981. R-L: Count Panza di Biumo (Italian art patron and collector), Johannes Cladders (Director of Staditsche Museum, Monchengladbach, Germany), Michael Spens (Scottish architect, editor/publisher of Studio International magazine and member of the RDG Board of Directors), Duncan Macmillan (Scottish art historian and senior curator, Talbot Rice Gallery, University of Edinburgh), at the Scottish National Gallery of Modern Art during The Avant-Garde in Europe, 1955-70 exhibition of the collection of Staditsche Museum, Monchengladbach.