dropping of smoke signals, which were relayed by the 'plane at the Battery to the ship; and, finally, the salvo. In a few minutes every train on the Elevated was out of commission.
North the aviator now sped, until he was hovering like a remorseless fate above the Ninety-first Street power station, which runs the street-railway system of Manhattan. The relay hydro-aëroplane moved up to First Street. In ten minutes' time a salvo had found its mark, and Manhattan was absolutely bereft of all means of transportation.
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That hive of busy workers known as "the downtown district" received its quota of the morning "rush" earlier than usual on April 2d. The optimistic tone assumed by the New York press was reflected among the citizens, who were sat-
