Havell's Tern. Trudeau's Tern (Plate CCCCIX) Sterna havelli. Sterna trudeaui

AFTER JOHN JAMES AUDUBON BY ROBERT HAVELL Havell's Tern. Trudeau's Tern (Plate CCCCIX) Sterna havelli. Sterna trudeaui engraving with etching, aquatint and hand-coloring, circa 1838, on J Whatman watermark 1837, with margins (slightly trimmed), the colors slightly attenuated, light- and time staining, pale scattered foxing and soft handling creases in places, short tears and paper losses in places at the sheet edges, otherwise in good condition P. 15¼ x 24¾ in. (387 x 629 mm.) S. 24¾ x 38 in. (629 x 965 mm.)