September 8th at Heart's Content, the day of the successful termination of the work of laying, recovering, completing and testing the Atlantic Telegraph Cables of 1865 and 1866, 1866, Watercolor over graphite with touches of gouache, Sheet: 7 3/8 ? 10 15/16 in. (18. 8 ? 27. 8 cm), Drawings, Robert Charles Dudley (British, 1826?1909), One of the 19th century's great technological achievements was to lay a telegraphic cable beneath the Atlantic, allowing messages to speed back and forth between North America and Europe in minutes, rather than ten or twelve days by steamer