Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Lower pool in garden: plan and sections (1/2" = 1'-0")

Black ink on off-white wove paper

Pastel on buff wove paper

Watercolor over graphite on off-white wove paper, mounted to matboard

Watercolor and graphite on off-white wove paper

Graphite on paper

Red ink, green fiber-tipped ink and watercolor on off-white wove paper

Graphite on paper

Graphite on paper

Spiral-bound sketchbook with blue cardboard covers

Graphite on off-white wove paper

Sketchbook with beige cloth covers and pencil sleeves

Graphite on paper