William Cavendish, 7th Duke of Devonshire returned for North Derbyshire. He succeeded his grandfather in the earldom of Burlington in 1834 and entered the House of Lords. In 1858 he also succeeded his cousin as Duke of Devonshire. He was Lord-Lieutenant of Lancashire from 1857 to 1891 and Lord-Lieutenant of Derbyshire from 1858 to 1891. Devonshire was Chancellor of the University of London from 1836 to 1856, Chancellor of the University of Cambridge from 1861 to 1891, and Chancellor of the Victoria University from 1880 to 1891. At Cambridge he endowed the Cavendish Professorship of Physics, and the building of the Cavendish Laboratory. He made vast
Cavendish Professor of Physics would cost £6,300. The then chancellor of the university, William Cavendish met that cost privately 18 months later, and named the department in honor of his relative, the 18th century natural philosopher Henry Cavendish. The first Cavendish Professor was the then relatively obscure James Clerk Maxwell, who had yet to complete the work that would make him the most renowned physicist of the nineteenth century. His appointment was announced on 8 March 1871, and despite initial disappointment at his being offered the place, his inaugural lecture was looked forward to by his likely students as well as his future colleagues.