Branch and Mathematical Notations; verso: Branch and Pentagon

Brown ink, brown wash, transparent and opaque watercolor, red and black chalk over black chalk underdrawing on seven pieces of light tan antique laid paper, pieced together and laid down overall

Brown ink, brown wash, transparent watercolor, and touches of blue chalk on cream antique laid paper

Brown ink on off-white antique laid paper; verso: graphite

Black and white chalk on cream antique laid paper, darkened to light tan, framing lines in brown ink and black ink

Black and red chalk and gray wash on cream antique laid paper, partial framing line in brown ink

Brown ink and brown and gray wash over black chalk on cream antique laid paper, framing lines in black ink over black chalk

Brown ink, brown wash, and graphite, additions in gray pastel and black chalk at upper left, on off-white antique laid paper

Brown ink, blue wash, white opaque watercolor, some oxidized in angels, over graphite, incised almost overall, on off-white antique laid paper, mounted down; two angels at lower right cut out, the rest of the drawing laid down, and piece readhered 7 mm lower with brown ink and blue wash fill

Brown ink and brown wash over black chalk on off-white antique laid paper; verso: incidental red chalk

Brown and black ink and gray wash with later additions in graphite and black ink on cream antique laid paper, framing line in graphite, mounted overall

Watercolor and black ink on beige antique laid paper, mounted overall; framing line in brown ink

Brown ink and gray wash on off-white antique laid paper, framing line in black ink