"Haus Sonnenfang" Sanatorium, Berlin, 1931: Sketch of perspectives and plans

Black ink, partly over graphite, on cream laid paper.

Colored marker on paper

Charcoal on paper

Black crayon on paper

Charcoal on paper

Black crayon on paper

Black crayon on paper

Graphite on cream wove paper

Charcoal on off-white wove paper

Black, blue, and aqua crayon on paper

Ink and colored pencil on paper

Graphite and green crayon on paper