Interview by Willoughby Sharp in May at Castle Norvenich. Includes exhibition history. Piece mentioned: A Metal Ring Encircling a Tree ; Beyond Lawn and Order, Sonsbeek ’71. Exhibitions mentioned: “Wege ’67,” Museum am Ostwall, Dortmund 1967 ; “Junge Deutsche Plastik”, Wilhelm Lehmbruck Museum, Duisburg, June 29-Sept. 22, 1968 ; solo shows at Galerie Ernst, Hanover, 1969, Galerie Fischer, Düsseldorf, 1969/1970, Galerie Ricke, Cologne, 1970, Mayfair Gallery, London, 1971, Paul Maenz, Cologne, Paula Cooper Gallery, Konrad Fischer ; “Beyond Lawn and Order” Arnhem, Holland. Photography by Pieter Boersma.