Brother of the following, born at Stockbridge, Massachusetts; was first a successful paper manufacturer, but turning his attention to submarine telegraphy was instrumental in establishing cable communication between England and America, and founded the Atlantic Telegraph Company in 1856; on the successful laying of the 1866 cable, since which time communication between the Old and New Worlds has never been interrupted, he was awarded a gold medal and the thanks of the nation; afterwards interested himself in developing the overhead railway in New York (1819-1892).