comparative trials by the Gauge Commissioners, Ixion of this class proved capable of speeds greater than its challenger. In 1843 Gooch introduced a new form of locomotive valve gear. In 1840, Gooch was responsible for identifying the site of Swindon Works and in 1846 for designing the first complete locomotive to be constructed there, Great Western, prototype of the GWR Iron Duke Class of 4-2-2 locomotives, which were able to achieve . Much renewed, they lasted to the end of the GWR broad gauge era. Although Gooch's locomotives were principally for the broad gauge, between 1854 and 1864 he also had to design a number of standard gauge classes for the GWR's new Northern Division. In 1864, he resigned from his post of Locomotive Superintendent, though he continued as a member of the GWR Board. Cable engineer and other roles From 1859, Gooch lived at Clewer Park in Windsor and was a Deputy Lieutenant for Berkshire. In 1865, he was recalled to the Great Western Railway Company as chairman. He was also chief engineer of the Telegraph Construction and Maintenance Company. In this role, he was instrumental in laying the first successful transatlantic telegraph cable, using the (1865/66). On completion of the cable, on 27 July 1866, Gooch, who was on the Great Eastern, sent a cable message to the Secretary of State for Foreign Affairs, Lord Stanley, saying "Perfect communication established between England and America; God grant it will be a lasting source of benefit to our country." Political career In 1865, while out of the country laying the cable, Gooch was elected Conservative MP for Cricklade. He held the seat until 1885. During his time as MP, he never addressed Parliament; he noted this in his diary when Parliament was dissolved on 18 November 1885 with the comment It would be a great advantage to business if there were a greater number who followed my example. Later business activities In 1866 Gooch was created a baronet in recognition of his cable work. In 1868, he became chairman of the Telegraph Construction & Maintenance Company after John Pender, the first chairman, resigned. He led the Great Western Railway out of near-bankruptcy and took a particular interest in construction of the Severn Tunnel. Final abandonment of the broad gauge did not take place until after his death at the age of 73. Family Gooch married Margaret Tanner in 1838; they