Keystone of an Arch, Frontal View and Profile; verso: Sketches of a Ground Plan and a Nude Male Figure

Graphite on envelope

Colored marker on paper

Graphite with yellow and blue crayon on paper

Brown ink and black chalk on beige modern laid paper

Graphite on paper

Graphite on off-white wove paper

Black chalk and gray wash on off-white antique laid paper, framing line in black chalk along left and bottom margins and framing line in black ink along top and right margins; verso: red chalk [another hand?]

Colored marker and black pen on paper

Graphite on paper

Graphite on paper

Black crayon on cream wove paper

B/w photocopy on red paper and adhesive on sketchbook paper