Branch and Mathematical Notations; verso: Branch and Pentagon

Black and brown ink, brown and gray wash and bluish-white opaque watercolor over black chalk on light tan antique laid paper, mounted on heavy antique laid paper and card

Brown ink, brown wash, and white and gray opaque watercolor over black chalk on off-white antique laid paper, partial framing line in graphite and mounted overall to wove paper

Black, red, and white chalk and brown and gray wash on cream antique laid paper, laid down

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

Brown ink, brown and gray wash, and black chalk over graphite on cream antique laid paper (?), partial framing line in brown ink, mounted overall to cream antique laid paper with gold leaf remnants from a previous mount; verso: red chalk and black chalk or graphite

Brown ink, gray wash, and green watercolor over graphite on cream antique laid paper, triple framing line in graphite

Brown ink on off-white antique laid paper

Black and white chalk and black wash on light tan antique laid paper, mounted overall

Brown ink and gray wash over black chalk on off-white antique laid paper

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

Black chalk and touches of white chalk on light tan paper

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