Samuel Morse, who introduced telegraph communications in the United States, was born 221 years ago today on April 27, 1791 in Charlestown, Massachusetts.
On 24th of May 1844, he famously sent the message “What hath God wrought” (quoting Numbers 23:23) by telegraph from Washington D.C to Baltimore.
The telegraph Morse code used in those days differed in a number of respects from the International Morse code used today and a description of the differences can be found at
Wiki – Samuel F. B. Morse
Wiki – Morse Code