Detail of Plato and Aristotle, after Luca della Robbia, Campanile, Florence Cathedral, Florence, Italy

Graphite and colored pencil on graph paper

Opaque watercolor on heavy weight white wove paper

Watercolor over graphite on off-white wove paper

Graphite on buff wove paper

Graphite on paper

Graphite on thin off-white wove paper

Black ink on white wove paper

Graphite on cream wove paper

Graphite and scratchwork on a gelatin silver print

Graphite on paper

Black chalk on buff tracing paper

Sketchbook with black fabric-covered cardboard covers, held by two metal rings