Today in 1907, Guglielmo Marconi inaugurated the first regular transatlantic radio-telegraph service between Clifden, Ireland and Glace Bay, Canada.
Five years earlier, on December 17, 1902, Marconi successfully sent a transmission from the Glace Bay station Nova Scotia, the first radio message to cross the Atlantic from North America.
G. A. Isted in GEC Review, 1991:
[Marconi] had a remarkable gift of inventiveness and experimentation together with an intuitive insight into the causes of failure in a particular line of investigation, and what to do to remedy the defect. He had, in fact, what one might call ‘wireless greenfingers.’