Three Arches in the Wall, Santa Maria Novella, Florence

Red chalk on off-white antique laid paper; verso: black chalk and brown ink

Graphite on paper

Red chalk on tracing paper

Graphite on paper

Charcoal and red-brown pastel on cream wove paper

Graphite on translucent vellum paper, the reverse printed with a grid

Black and red chalks, and gouache on antique laid paper

Graphite on paper

B/w photocopies, adhesive, and black marker on paper

Black and red marker on paper

Red chalk on cream antique laid paper; verso: red chalk and graphite

Brown ink and brown wash over traces of black chalk on cream antique laid paper