| Y/M/D | Description | Place |
|---|---|---|
| 1838/00/00 | Morse ask Smith for Congressional support to build a telegraph line. Smith offers to become Morse's counsel, and in 1838, he is given a quarter interest in the patent. Smith authors a bill for 30,000 dollars for a line between Washington and Baltimore. | United States Capitol, Washington, DC |
| 1842/00/00 | Samuel Morse test his telegraph between Manhattan's Battery Park and Governors Island. | Governors Island, |
| 1844/05/01 | Samuel F B Morse demonstrates his telegraph by he sending the news that the Whig Party has nominated Henry Clay for US President from the party's convention in Baltimore to the Capitol Building. | |
| 1844/05/24 | Samuel Morse sends the message, "What hath God wrought" over his telegraph 30 miles (48 km) from the Supreme Court chamber in the basement of the US Capitol building in Washington DC to Baltimore and Ohio's Mount Clare station in Baltimore, Maryland. | Baltimore and Ohio Transportation Museum and Mount Clare Station, Baltimore, MD |
| 1844/05/24 | Samuel Morse sends the message, "What hath God wrought" over his telegraph 30 miles (48 km) from the Supreme Court chamber in the basement of the US Capitol building in Washington DC to Baltimore and Ohio's Mount Clare station in Baltimore, Maryland. | Old Supreme Court Chamber, United States Capitol |
| 1845/00/00 | Theodore S Faxton negotiates with Prof Morse, the inventor, for an interest in the telegraphic business and in company with others organized the New York, Albany and Buffalo telegraph company. | |
| 1865/00/00 | During the American Civil War, the American Union Co buys John P Humiston's duplex telegraph system which carries four messages over one wire. After many years in the courts, Humiston will receive $5,000. | |
| 1867/00/00 | Joseph B Stearns is elected president of the Franklin Telegraph Co, operating between Boston and Washington, a post which he held for 2.5 years. He invents the duplex system of telegraphy, where 2 messages can be sent over the same wire at the same time. | |
| 1875/09/28 | Elisha Gray is awarded a US Paton No 168,249 for Printing Telegraph, a typewriter-style devise for people untrained in Morse code. | |
| 1876/06/25 | Elisha Gray "astonished the judges" at the Centennial Exhibition by sending eight telegraph messages simultaneously. |
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