"Haus Sonnenfang" Sanatorium, Berlin, 1931: Sketches of perspectives and plan

Colored marker, dried leaf, and adhesive on paper

Graphite on paper

Graphite on paper

Black marker and graphite on paper

Graphite on paper

Colored marker and black and blue pen on paper

Graphite on paper

Black crayon on paper

Blue pen on ruled paper folded and adhered to sketchbook paper

Colored marker, black pen, b/w photocopies, and adhesive on paper

Black and red marker on paper

Colored marker and black ink on paper