Frank Residence, Pittsburgh, Pennsylvania, 1939-1940: Detail of waterstop at covered ramp: elevations and section (1/4" = 1'-0" and full size)

Graphite and colored pastel on gray-green laid paper

Graphite on paper

Oil on off-white wove paper

Black ink on off-white wove paper

Watercolor on off-white wove paper

Graphite on off-white wove paper

Graphite on off-white wove paper

black crayon, ink, with blue and orange watercolor; verso: black crayon and ink on paper

Black ink on thin off-white wove paper

Graphite and gesso on paper

Charcoal on blue wove paper

Graphite on off-white wove paper