1 Piece. Hand-colored Engraving. "Mergus" [The Round-Crested Duck or Hooded Merganser."] [The Natural History of Carolina... London, 1771, third edition, vol. 1, plate 94.] 10 1/4 x 13 3/8 inches; 260 x 340 mm, wide (full?) margins, on wove paper. Rey scattered, very light foxing, crisp and attractive.