National Zoological Park, Site Visit with Frederick Law Olmsted, 1890, Smithsonian Institution Archives, With (left to right) W.C. Winlock, G.B. Goode, C.W. Schuermann, W.T. Hornaday, J.G. Traylor, F.L. Olmsted, Secretary Langley, Dr. Frank Baker, and H.W. Dorsey..