Formal Picture of "National Park Group at Venetian Ball". Group is in costume; From left to right: Dr. W.A. Clark, photographer; Mr. Elbert K. Burlew, Assistant to the Secretary of Interior; Dr. David Fairchild, President Tropical Everglades Park Association; Mr. Roger Toll, Superintendent of Yellowstone National Park; Marjory Stoneman Douglas, author; Dr. T. Gilbert Pearson, President of the Audubon Societies of America; Dr. Hermon C. Bumpus, First Director of the American Museum of Natural History; Hon. Horace M. Albright, Director of the National Park Service.