"Haus Sonnenfang" Sanatorium, Berlin, 1931: Sketch of perspective

Transparent and opaque watercolor, black ink, over graphite on off-white wove paper

Graphite on paper

Black and red marker and black pen on paper

Ink and applied type on paper

Graphite on paper

Black and red marker on paper

Graphite on paper

Black and colored crayons on off-white wove paper mounted to cream wove paper

Black marker on paper

Graphite, watercolor, and ink on paper

Black crayon on paper

Graphite and colored pencil on paper