 This side of his work – poetry, drawings, artists' books – is represented in many major collections including the Victoria and Albert Museum (London), the Herzog August Bibliothek (Wolfenbüttel), the New York Public Library, the Sackner Archive (Florida), the Getty Museum (Los Angeles), the Special Collection, Maughan Library, King's College London, the Staatsgalerie Stuttgart, the Department of Prints and Drawings, British Museum (London) and Tate Britain.He held a retrospective of his drawings and concrete poems at the National Library of Czechoslovakia, Prague, in 1997.Poems of his have been set to music by Gerhard Lampersberg and Wolfgang Florey.