In the summer of 1857, he famously served as counsel for Madeleine Smith, a Glasgow socialite who was the defendant in a sensational murder trial.
In March 1858 he resumed this office in Lord Derby's second administration, being returned to the House of Commons as member for Stamford.
[4] He was made a Privy Counsellor in 1859, and awarded a Doctor of Civil Law (DCL) by the University of Oxford in 1859.
[6] He died at Loganbank, a villa in Glencorse[7] south of Edinburgh on 20 August 1891, the day before his 81st birthday.
A memorial to Lord Glencorse (in the Jacobean style) stands in the south-east corner of St Giles Cathedral on the Royal Mile in Edinburgh, above the stairway from the church to the crypt, near the entrance to the Thistle Chapel.