19th-20th century
Black marker on paper
20th centuryGermanInk on paper
ChineseWatercolor on off-white card
19th centuryAmericanSketchbook with cardboard covers and spiral wire binding
20th centuryAmericanBlack and red marker on paper
20th centuryGermanGraphite on off-white wove paper
20th centuryAmericanBrown and gray ink over graphite on cream paper
18th-19th centuryBritishColored marker on paper
Graphite on paper
20th centuryGerman?Black and white crayon on gray laid paper
19th centuryAmericanBlack, red and white chalk with touches of graphite on tan antique laid paper, laid down on tan antique laid paper, framing lines in black and brown ink
18th centuryFrenchWatercolor over graphite on off-white wove paper
19th-20th centuryAmerican