Samuel F. B. Morse frases e citações
Samuel F. B. Morse: Frases em inglês
Quoted in John F. Stover, History of the Baltimore and Ohio Railroad (1987, Purdue University Press), ISBN 0-911198-81-4, pp. 59–60
Message sent by Morse to officially open the first telegraph line, from Baltimore to Washington, on May 24, 1844