Richard Long, A Line Made by Walking, 1967, Photograph, gelatin silver print on paper with graphite on board, Tate, London. https://dartabase.art/cite/tate/AR00142 Richard Long, Walking a Straight 10-Mile Line, Dartmoor, England, 1970, Typewriting on cut-and-pasted paper, cut-and-pasted printed map, and gelatin silver print on board, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/36644 Richard Long, River Avon Book, 1979, Book with mud on paper, Tate, London. https://dartabase.art/cite/tate/AR00144 Richard Long, Somerset Willow Line, 1980, Willow wood, Tate, London. https://dartabase.art/cite/tate/AR00615 Richard Long, Ring of stones, 1982, Stone, Queensland Art Gallery and Gallery of Modern Art, Brisbane. https://dartabase.art/cite/qagoma/2098 Richard Long, River Avon Mud Drawing, (1986), Mud on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33653 Richard Long, River Avon Mud Drawing, (1986), Mud on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33636 Richard Long, River Avon Mud Drawing, (1986), Mud on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/33644 Richard Long, River Avon Mud drawings, Ten Mud-dipped papers, 1988, 10 works on paper, mud, Tate, London. https://dartabase.art/cite/tate/AR00616 Richard Long, Nile (Papers of River Muds), 1990, Book, Tate, London. https://dartabase.art/cite/tate/AR00599 Richard Long, In the Cloud, 1991, Screenprint on board, Tate, London. https://dartabase.art/cite/tate/AR00143 Richard Long, [Untitled], 1992, Mississippi mud on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/37189 Richard Long, Cornish Slate Ellipse, 2009, Slate, Tate, London. https://dartabase.art/cite/tate/AR00703