Polymorph 2010 Brain drawings 2007 Tar rubber ink 1997-2000 Washington sheets 1997-98 Hidden drawings 1992 Imaginary maps and climbing drawing 1992 Ink and transparent paper 1987 Charcoal drawings 1987 Wavebands 1987 Black and white gouaches 1985 Encre de Chine 1985 Brush drawings 1985 Pen drawings 1984-85