John James Audubon, Tree Swallow (Tachycineta bicolor), Study for Havell pl. 98 (variantly numbered pl. 100 as in N-YHS copy); sketches of an egg and a feather, 1824. Watercolor, graphite, gouache, pastel, black chalk, and black ink with selective glazing on paper, laid on card; 18 15/16 x 11 13/16 in. (48.1 x 30 cm)New-York Historical Society, Purchased for the Society by public subscription from Mrs. John J. Audubon, 1863.17.100
