1860
U.S. Patent Office, 1830
Charles Bierstadt, 1875
U.S. Patent Office, 1870
U.S. Patent Office, 1850
Charles Bierstadt, 1865
Charles Bierstadt, 1874
U.S. Patent Office, 1860
U.S. Patent Office, 1840
U.S. Patent Office, 1910
