Back of the postcard. Some of the wording is not readable. It looks like the postcard was sent to a woman, Miss Stewart of California, from Paul Smith.
Description printed on photograph's accompanying sheet of paper: "Howard Hughes is appointed Aeronautic Adviser to the New York Worlds Fair 1939 by Grover Whalen, its president."
Howard Hughes (wearing hat) receives congratulations from Mayor Fiorello La Guardia at Floyd Bennett Airport in Brooklyn. The gentleman wearing a polka dot bow tie, standing behind the mayor is Grover Whalen. Mr. Whalen was president of the 1939 New York World's Fair.