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

Ink, graphite, and colored washes on paper, spatter-painted

Graphite on cream wove paper

Black, blue, and aqua crayon on paper

Black marker on paper

Graphite on paper

Black and aqua crayon on paper

Red and black marker and blue ink on paper

Black and red marker on paper

Graphite on paper

Colored marker on paper

Black marker on paper

Colored crayons on paper