Background
The son of John Buchan of Letham, East Lothian, by Elizabeth, daughter of Patrick Hepburn of Smeaton, he was born in March 1739.
The son of John Buchan of Letham, East Lothian, by Elizabeth, daughter of Patrick Hepburn of Smeaton, he was born in March 1739.
He was educated at the University of Edinburgh, where Henry Dundas was among his close friends.
Buchan succeeded to the barony of Smeaton-Hepburn in 1764, and assumed the name and arms of Hepburn of Smeaton. On 31 December of the following year he was made baron of the exchequer. He retired in 1814, and on 6 May 1815 was created a baronet.
Buchan died 3 July 1819.
Buchan married:
Jane, eldest daughter of Alexander Leith of Glenkindy and Freefield, and
Margaretta Henrietta, daughter of John Zacharias Beck, and widow of Brigadier-general Fraser.
In January 1763 he had been admitted a member of the Faculty of Advocates, Edinburgh, and from 1767 he was solicitor to the lords of session till 1790, when he was appointed judge of the High Court of Admiralty in Scotland.