Valentia Island - History

History

Valentia was the eastern terminus of the first commercially viable transatlantic telegraph cable. The first attempt in 1857 to land a cable from Ballycarbery Strand on the mainland just east of Valentia Island ended in disappointment. After subsequent failures of cables landed at Knightstown in 1858 and Foilhommerum Bay in 1865, the vast endeavor finally resulted in commercially viable transatlantic telegraph communications from Foilhommerum Bay to Heart's Content, Newfoundland in 1866. Transatlantic telegraph cables operated from Valentia Island for one hundred years, ending with Western Union International terminating its cable operations in 1966.

Prior to the transatlantic telegraph, American longitude measurements had a 2,800-foot (850 m) uncertainty with respect to European longitudes. Because of the importance of accurate longitudes to safe navigation, the U.S. Coast Survey mounted a longitude expedition in 1866 to link longitudes in the United States accurately to the Royal Observatory in Greenwich. Benjamin Gould and his partner A. T. Mosman reached Valentia on 2 October 1866. They built a temporary longitude observatory beside the Foilhommerum Cable Station to support synchronized longitude observations with Heart's Content, Newfoundland. After many rainy and cloudy days, the first transatlantic longitude signals were exchanged between Foilhommerum and Hearts's Content on October 24, 1866.

In 1993, an undergraduate geology student discovered fossilised tetrapod trackways (51°55′51″N 10°20′38″W / 51.930868°N 10.343849°W / 51.930868; -10.343849), footprints in mud preserved in Devonian rocks on the north coast of the island. About 385 million years ago, a primitive vertebrate passed along a muddy shoreline in the equatorial swampland that is now southwestern Ireland and left prints as if in wet concrete. The prints were preserved by silt overlying them, and were converted to rock over the ages. The Valentia Island trackways are among the oldest signs of vertebrate life on land and have been studied extensively by the palaeontologist Dr Stössel.