Fig. 1: Collection of The New-York Historical Society (1863.17.211). Digital images created by Oppenheimer Editions. Fig. 2: Collection of The New-York Historical Society (1863.17.211). Digital images created by Oppenheimer Editions. Fig. 3: Tyler Collection, John James Audubon Museum, in Henderson, Kentucky. Fig. 4: Collection of The New-York Historical Society (1863.18.7). Digital images created by Oppenheimer Editions. Fig. 5: Oil on canvas mounted on panel, 20 x 30 inches. Godel & Co., New York; photographer: Allan Tarantino. Fig. 6: Collection of The New-York Historical Society (1863.17.120). Digital images created by Oppenheimer Editions. Fig. 7: Collection of The New-York Historical Society. Digital images created by Oppenheimer Editions. Fig. 8: Collection of The New-York Historical Society (1863.17.1). Digital images created by Oppenheimer Editions. Fig. 9: Collection of The New-York Historical Society. Digital images created by Oppenheimer Editions. Fig. 10: Collection of The New-York Historical Society. Digital images created by Oppenheimer Editions. Fig. 11: Photo by Denis Finnin. Image # 1498, American Museum of Natural History. Fig. 12: From the Archives of the Museum of Comparative Zoology, Ernst Mayr Library, Harvard University. Fig. 13: Collection of The New-York Historical Society (1863.17.406). Digital images created by Oppenheimer Editions. Fig. 14: John James Audubon Museum in Henderson, Kentucky. Fig. 15: John James Audubon Museum in Henderson, Kentucky. Fig. 16: Collection of The New-York Historical Society (1863.17.62). Digital images created by Oppenheimer Editions. Fig. 17: Collection of The New-York Historical Society (1863.17.324). Digital images created by Oppenheimer Editions. Fig. 18: Collection of The New-York Historical Society (1863.17.68). Digital images created by Oppenheimer Editions. Fig. 19: Collection of The New-York Historical Society (1863.17.26). Digital images created by Oppenheimer Editions. Fig. 20: Collection of The New-York Historical Society. Digital images created by Oppenheimer Editions. Fig. 21: Collection of The New-York Historical Society (1863.18.30). Digital images created by Oppenheimer Editions. Fig. 22: Collection of The New-York Historical Society (1863.17.137). Digital images created by Oppenheimer Editions. Fig. 23: Collection of The New-York Historical Society. Digital images created by Oppenheimer Editions. Fig. 24: Collection of The New-York Historical Society (1863.17.102). Digital images created by Oppenheimer Editions. Fig. 25: Collection of The New-York Historical Society (1863.17.21). Digital images created by Oppenheimer Editions. Fig. 26: Collection of The New-York Historical Society (1863.17.32). Digital images created by Oppenheimer Editions. Fig. 27: Collection of The New-York Historical Society (1863.17.76). Digital images created by Oppenheimer Editions. Fig. 28: Collection of The New-York Historical Society (1863.17.061). Digital images created by Oppenheimer Editions. Fig. 29: Photo by Denis Finnin. Image # 1822, American Museum of Natural History, Library. Fig. 30: Collection of The New-York Historical Society (1863.17.6). Digital images created by Oppenheimer Editions. Fig. 31: Collection of The New-York Historical Society (1863.17.226). Digital images created by Oppenheimer Editions. Fig. 32: Collection of The New-York Historical Society (1863.17.31). Digital images created by Oppenheimer Editions. Fig. 33: Collection of The New-York Historical Society (1863.17.136). Digital images created by Oppenheimer Editions. Fig. 34: Collection of The New-York Historical Society (1863.17.321). Digital images created by Oppenheimer Editions. Fig. 35: Collection of The New-York Historical Society (1863.17.222). Digital images created by Oppenheimer Editions. Fig. 36: Collection of The New-York Historical Society (1863.17.326). Digital images created by Oppenheimer Editions. Fig. 37: Collection of The New-York Historical Society (1863.17.213). Digital images created by Oppenheimer Editions. Fig. 38: Oppenheimer Field Museum Edition (plate 12), courtesy of Oppenheimer Editions. Fig. 39: Oppenheimer Field Museum Edition (plate 1), courtesy of Oppenheimer Editions. Fig. 40: Oppenheimer Field Museum Edition (plate 52), courtesy of Oppenheimer Editions. Fig. 41: Fort Union On The Missouri, Karl Bodmer, Aquatint/Engraving, ca. 1839–49, Montana Historical Society, X1970. 27. 09. Fig. 42: Oppenheimer Field Museum Edition (plate 57), courtesy of Oppenheimer Editions. Fig. 43: Image # 2A12973, American Museum of Natural History, Library. Fig. 44: Collection of The New-York Historical Society (1863.17.313). Digital images created by Oppenheimer Editions.