The telegraph manual: a complete history and description of the semaphoric, electric and magnetic telegraphs of Europe, Asia, Africa, and America, ancient and modern.

RECAPITULATION. 421
From the foregoing it will be seen that Morse devised a system of telegraphing in 1832, and that he made some type for
the model; that in 1835-'36, he exhibited it in operation to
his friends in New-York; in 1837 he devised his system of
combined circuits; in 1844 he applied the local circuit, witho.ut
the combination of circuits on the main line, and on the 27th
day of May, 1844, he worked successfully the line, forty miles
long, from Baltimore to Washington; and that the first dispatch,
benign in its source and conception, was,
"WHAT HATH GOD WROUGHT?":
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