"Shortly before mid-day I placed the single earphone to my ear and started listening. . . . I heard, faintly but distinctly, pip-pip-pip. . . . I now felt for the first time absolutely certain that the day would come when mankind would be able to send messages without wires not only across the Atlantic, but between the farthermost ends of the earth." The most likely speaker of the above quotation was a Guglielmo Marconi. b Thomas Edison. c Alexander Graham Bell.