The second son of Lieutenant-Colonel Robert Campbell of the 42nd Highlanders, and Susanna Renton, whose family owned extensive estates in Lamberton and Mordington on the Scottish border, Campbell was born at Edinburgh into a family ‘who had long been respected for their endeavours to provide for the amusements and sports’ of Berwick-upon-Tweed.
At the 1847 general election Renton offered for Berwick-upon-Tweed, five miles south-east of his home at Mordington House, declaring that although he was ‘a Conservative in principle’, he was not ‘a blind follower of any man or party’.
At the 1852 general election, Renton was noticeably ambiguous on the issue of franchise reform, stating only that the subject ‘needed to be watched and discussed, adopted neither hastily nor violently’, and after a bitter and corrupt contest, was defeated by his two Liberal opponents.
Following the death of his younger brother, William Mark Campbell, Renton inherited further lands in Symington, Lanarkshire, 23 Jan. 1854, but while visiting Malta in February 1856, he died suddenly from the effects of the rupture of a blood vessel.
