- A first edition of Audubon's Quadrupeds (1845-1854), estimated at $400,000-600,000.
- Ten volumes of the works of Daniel Giraud Elliot (1861-1895), uniformly cased (est. $200,000-300,000).
- A large collection of the color prints of Jacques Gautier D'Agoty (est. $200,000-300,000).
- Pierre-Joseph Redoute's Les Liliacees (1802-1816), est. $100,000-150,000.
- Gould's monograph on hummingbirds (1849-1861, plus the later supplement), est. $80,000-120,000.
- King Leopold I's copy of Gould and Sharpe's Birds of Asia (1850-1883), est. $70,000-100,000.
- George Brookshaw's Pomona Britannica (1804-1812), an illustrated treatise on fruit (est. $70,000-100,000).
- Priscilla Bury's Selection of Hexandrian Plants (1831-1834), by an accomplished amateur botanic artist (est. $60,000-90,000).
- Maria Sibylla Merian's Metamorphosis Insectorum Surinamensium (1705), est. $50,000-80,000.
- McKenney's and Hall's History of the Indian Tribes of North America (1836-1844), in original parts.
- Buffon's Histoire Naturelle de Oiseaux (1770-1786), a large-paper copy (est. $40,000-60,000).