Untitled (visual field sketch, left page); Untitled (snowfield sketch, right page)

Red and black marker on paper

Colored marker and black ink on paper

Colored marker and opaque watercolor on paper

Red and black marker on paper

Colored marker on paper

Colored marker on paper

Red and black marker on paper

Red and black marker on paper

Watercolor, acrylic and graphite on off-white wove paper

Mixed media

Colored marker and black ink on paper

Colored marker and blue felt-tipped pen on paper