Details, Triangular Sections of Ceiling, Piccolimini Library, Duomo, Siena

Black ink on off-white wove paper

Graphite on paper

Oil and black ink on wove paper

Black tempera, with touches of green gouache[?], on off-white wove paper

Black wash over graphite on cardboard

Black ink and yellow and black chalk on off-white wove paper

Watercolor, tempera, gouache, black chalk, and graphite, with touches of varnish(?) on off-white wove paper mounted to off-white-paper-covered gray board

Black ink on darkened off-white wove paper

Watercolor over graphite on buff laid paper

Watercolor on off-white wove paper, mounted to off-white cardboard

Graphite with stylus and extensive stumping on ivory wove paper

Graphite on buff wove paper