In a demonstration witnessed by members of Congress, American inventor Samuel F.B. Morse dispatched a telegraph message from the U.S. Capitol to Alfred Vail at a railroad station in Baltimore, Maryland. The message—“What Hath God Wrought?”—was telegraphed back to the Capitol a moment later by Vail. The question, taken from the Bible (Numbers 23:23), had been suggested to Morse by Annie Ellworth, the daughter of the commissioner of patents.

Morse, an accomplished painter, learned of a French inventor’s idea of an electric telegraph in 1832 and then spent the next 12 years attempting to perfect a working telegraph instrument. During this period, he composed the Morse code, a set of signals that could represent language in telegraph messages, and convinced Congress to finance a Washington-to-Baltimore telegraph line.

On May 24, 1844, he inaugurated the world’s first commercial telegraph line with a message that was fitting given the invention’s future effects on American life.

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