Office and Factory Buildings, Cali, Colombia, 1945: Office unit: construction and millwork details (1/4", 1", 1 1/2" and 6" = 1'-0")

Watercolor on off-white wove paper

Paper collage and gouache

Crayon on paper

Black ink on tan wove paper

Graphite on ruled notebook paper, mounted on heavy card

Graphite on off-white wove paper

Pen and brown ink over graphite on off-white wove paper

Ink and graphite on commercially ruled, hole punched paper

Charcoal on off-white laid paper

Pastel on ground of gold paint on cardboard

Watercolor over graphite on off-white wove paper

Black fiber-tip ink on thin cream wove paper mounted to white cardboard