Office and Factory Buildings, Cali, Colombia, 1945: Revision of drawing BRGA.105.18 (1/8", 1/4", 1 1/2" and 6" =1'-0")

Black ink, graphite, and yellow chalk on off-white wove paper

Colored crayon on brown wove paper

Charcoal on paper

Watercolor, graphite wash and graphite on off-white wove paper; verso: graphite

Gray wash on tan wove paper

Graphite on cream wove paper

Graphite on paper

Crayon on discolored cream wove paper

Collage

Black ink on off-white wove paper

Graphite on paper

Black and red chalk on white wove sketchbook paper