Daniel H. Riggs, Howard University Medicine, in the South Yard of the Smithsonian Institution Building, stands next to his carriage. Picture shows the East Wing after Adolph Cluss’ 1884 renovation. Against the building are sheds, used by the Department of Living Animals, 1887-1890 (Smithsonian Archives)
Here’s a photograph from 1890 which shows Dr. Daniel H. Riggs of Howard University...