Study (right angle), 1977, 24x29cm, graphite on paper

Study (right angle), 1977, 24x29cm, graphite on paper

Right Angle, 1977, 34.8x39.1cm, pencil on paper

Right Angle, 1977, 34.8x39.1cm, pencil on paper

Untitled, 1978, graphite on paper

Untitled, 1978, graphite on paper

Untitled, 1978, watercolor and pencil on paper

Untitled, 1978, watercolor and pencil on paper

Untitled, 1978, graphite and watercolor on paper

Untitled, 1978, graphite and watercolor on paper

Untitled, 1978, oil on paper

Untitled, 1978, oil on paper

Untitled, 1978, watercolor on paper

Untitled, 1978, watercolor on paper

Untitled, 1977, graphite on paper

Untitled, 1977, graphite on paper

Untitled, 1978, watercolor on paper

Untitled, 1978, watercolor on paper

Untitled, 1981, graphite on paper

Untitled, 1981, graphite on paper

Digital 자화상 Study, 1980s, 42.2x56.8cm, ink and graphite on paper

Digital 자화상 Study, 1980s, 42.2x56.8cm, ink and graphite on paper

Untitled, 1980, graphite on paper

Untitled, 1980, graphite on paper

Untitled, 1981, watercolor on paper

Untitled, 1981, watercolor on paper

Untitled, 1980, watercolor on paper

Untitled, 1980, watercolor on paper

Untitled, 1982, 30x38cm, watercolor and charcoal on paper

Untitled, 1982, 30x38cm, watercolor and charcoal on paper

Untitled, 1982, watercolor and charcoal on paper

Untitled, 1982, watercolor and charcoal on paper

Untitled, 1982, gauche, graphite and charcoal on paper

Untitled, 1982, gauche, graphite and charcoal on paper

Untitled, 1982, gauche, graphite and charcoal on paper

Untitled, 1982, gauche, graphite and charcoal on paper

Egyptian Self-Portrait, 1983, 68x48cm, pastel on paper

Egyptian Self-Portrait, 1983, 68x48cm, pastel on paper

Big Dipping, 1983, 77.5x113cm, charcoal on paper

Big Dipping, 1983, 77.5x113cm, charcoal on paper

Mayan Observatory, 1983, 31.3x40cm, charcoal on paper

Mayan Observatory, 1983, 31.3x40cm, charcoal on paper

Cold-Meditation, 1985, 70x100cm, oil on paper

Cold-Meditation, 1985, 70x100cm, oil on paper

Lacuna, charcoal on paper

Lacuna, charcoal on paper

Untitled, graphite on paper

Untitled, graphite on paper

Untitled, 1985, pastel and graphite on paper

Untitled, 1985, pastel and graphite on paper

Untitled, 1985-95, pastel on paper

Untitled, 1985-95, pastel on paper

Untitled, 1985-95, pastel on paper

Untitled, 1985-95, pastel on paper

Untitled, 1985-95, pastel on paper

Untitled, 1985-95, pastel on paper

Untitled, 1985-95, pastel on paper

Untitled, 1985-95, pastel on paper

Untitled, 1985-95, charcoal and watercolor on paper

Untitled, 1985-95, charcoal and watercolor on paper

Brandenburg Gate, 1983, 70x100cm, conte on paper

Brandenburg Gate, 1983, 70x100cm, conte on paper

Horse Tomb, 1984, 70×100 cm, pastel on paper

Horse Tomb, 1984, 70×100 cm, pastel on paper

Lost, 1984, 70×100 cm, gouache on paper

Lost, 1984, 70×100 cm, gouache on paper

Birth of a Painter, 1985, 33x50cm, charcoal pencil watercolor on paper

Birth of a Painter, 1985, 33x50cm, charcoal pencil watercolor on paper

The Wheel, 1985, 45x42, charcoal on paper

The Wheel, 1985, 45x42, charcoal on paper

Visiting, 1985, 45x42cm, charcoal on paper

Visiting, 1985, 45x42cm, charcoal on paper

Ganymede, 1986, 20x34.5cm, charcoal on paper

Ganymede, 1986, 20x34.5cm, charcoal on paper

1948, 1987, 33X50cm, charcoal on paper

1948, 1987, 33X50cm, charcoal on paper

말무덤 (Horse Tomb), 1988, 66x100cm, charcoal and gouache on paper

말무덤 (Horse Tomb), 1988, 66x100cm, charcoal and gouache on paper

Luxor, 1982, charcoal on paper

Luxor, 1982, charcoal on paper

Untitled, 1984, charcoal on paper

Untitled, 1984, charcoal on paper

Serpent Mound, 1988, charcoal on paper

Serpent Mound, 1988, charcoal on paper

Untitled, 1989, watercolor on paper

Untitled, 1989, watercolor on paper

Constellation, oil on paper

Constellation, oil on paper

Season, 1988, 56.4x42cm, watercolor on paper

Season, 1988, 56.4x42cm, watercolor on paper

Untitled, 1992, 68.5×93cm, oil on map

Untitled, 1992, 68.5×93cm, oil on map

Self Portrait, 1987, 86x125cm, oil on map

Self Portrait, 1987, 86x125cm, oil on map

Untitled, 50.5×75.5cm, charcoal on map

Untitled, 50.5×75.5cm, charcoal on map

Pain-ter, 1988-1990, 96x105cm, charcoal on paper

Pain-ter, 1988-1990, 96x105cm, charcoal on paper

Map 1991.7.3, 1991, 51.7x75.4cm, oil and charcoal on map

Map 1991.7.3, 1991, 51.7x75.4cm, oil and charcoal on map

Map 1993.9.31, 1993, 72×102cm, oil and charcoal on map

Map 1993.9.31, 1993, 72×102cm, oil and charcoal on map

Map of Big Dipper, 63.3x95.8cm, charcoal and collage on map

Map of Big Dipper, 63.3x95.8cm, charcoal and collage on map

Scythian Song, 1997, 41.2x28cm, watercolor and graphite on music paper

Scythian Song, 1997, 41.2x28cm, watercolor and graphite on music paper

Vermont Deth, 1997, watercolor and pencil on music paper

Vermont Deth, 1997, watercolor and pencil on music paper

Through the Mirror, 1997, 42.8x28cm, watercolor and pine needles on music paper

Through the Mirror, 1997, 42.8x28cm, watercolor and pine needles on music paper

Planning, 1997, watercolor and graphite on staff paper

Planning, 1997, watercolor and graphite on staff paper

Birch seeds, 1999, 24.5x19cm, pencil on paper

Birch seeds, 1999, 24.5x19cm, pencil on paper

Notebook 1, 2008, graphite on paper

Notebook 1, 2008, graphite on paper

Notebook 2, 2008, graphite on paper

Notebook 2, 2008, graphite on paper

Notebook 3, 2008, graphite on paper

Notebook 3, 2008, graphite on paper

Thaw 2, 2001, 16x23cm, pastel on paper

Thaw 2, 2001, 16x23cm, pastel on paper

Window Rock Apache, 2007, pastel on paper

Window Rock Apache, 2007, pastel on paper

7.2cm Pi, 2007, 7.2x22.5cm, pastel and sand on paper

7.2cm Pi, 2007, 7.2x22.5cm, pastel and sand on paper

Abiquiu, 2007, 14x18.3cm, pastel on paper

Abiquiu, 2007, 14x18.3cm, pastel on paper

Mt Taos, 2007, pastel on paper

Mt Taos, 2007, pastel on paper

Thawing, 2007, 17x25in, pastel on paper

Thawing, 2007, 17x25in, pastel on paper

Sun Set Crater Arizona Volcano, 2008, 25x32.5, pastel on paper

Sun Set Crater Arizona Volcano, 2008, 25x32.5, pastel on paper

Cove Pine, 2008, pastel and sand on paper

Cove Pine, 2008, pastel and sand on paper

Masonic Temple, 2010, 23x30.5, pastel on paper

Masonic Temple, 2010, 23x30.5, pastel on paper