My fondest memory of Denis is at a meeting at Katoomba 23 October 2003, opposing the proposed sand mine at Newnes Junction, on the border of the World Heritage Area. The rally, organised by the Colong Foundation and Blue Mountains Conservation Society, heard arguments against the mine from Ian Cohen (Greens MLC), Keith Muir and Fiona McCrossan (Colong Foundation), local resident Sean Butler and Andrew Cox (National Parks Association of NSW). I noticed Denis walk in and I suddenly thought of the connection between sand mining and concrete, so I rushed up to him and asked him if he would recite 'Concreto' at the end of the meeting. As always, Denis was happy to contribute and the audience joined in with great gusto. It was wonderful to watch the developers endure Denis and the audience in full flight with: 'It's grey.....smooth...beautiful.... concreto'. Even the developers had to smile!