After the marriage of Mary Queen of Scots to Darnley, while Master of Oliphant, he sat as an extraordinary member of the privy council in August 1565.
In 1565 certain persons accused of serious crimes took over his house of Berrydale, which they garrisoned and held; but on 13 April 1566 they were ordered by the council to give it up to him within 24 hours under pain of being treated as rebels, i.e. being hang, drawn and quartered upon capture.
[2] After the death of the Regent Moray in January 1570, Oliphant met the leaders of the queen's party at Linlithgow, where they had a conference with the French ambassador.
After the retirement of Morton from the regency, Oliphant attended the meeting of the parliament in Stirling Castle on 16 July 1578, presided over by the king.
In November 1580 he was charged to answer before the council for an attack on Lord Ruthven, and on 7 December caution money was set that he would on the 9th enter into ward in Doune Castle in Menteith.
Together, they were the parents of two sons and three daughters, including::[1] Lord Oliphant died at Caithness on 16 January 1593, and was buried in the church of Wick.