‘A fat-faced man with rather greyish whiskers’, Cox was a significant figure in Derby’s public and political life, yet made little impact at Westminster during his brief parliamentary career.
First elected as a Conservative town councillor in 1851, Cox held a succession of local offices in the early 1860s. He was sheriff and then high sheriff of the county in 1860 and 1861, served as mayor of Derby in the same period, and as an alderman thereafter. He was appointed a magistrate in 1862 and Justice of the Peace a year later.
At the 1865 general election he stood as a Conservative for Derby, where divisions among his opponents and the entry of a third Liberal assisted his return in first place, ahead of a popular rival. During the campaign and afterwards, he cited his support for moderate pragmatic reform, saying that he would ‘vote for such measures as I think are good and useful for my country and for my native town, whether they be brought forward by Whig, Tory, or Radical’.
Cox’s election in 1865 had depended upon a fortuitous set of circumstances, and it was no surprise when the Liberals, who were now united and strongly backed by newly enfranchised railway workers, recaptured both Derby seats in 1868, relegating Cox to third place.
