THOMAS BUCHAN was an officer in the Scots army, in the time of King Charles II., and rose to the rank of lieut.-colonel in the Royal Regiment of Scots Horse, which was disbanded in 1689. King James II. promoted him to the colonelcy of the TWENTY-FIRST regiment; and he adhered to the interests of the Stuart family at the Revolution in 1688. He served in Ireland under King James, and was detached with a few men to Scotland, to support the Highland clans in their resistance to the government of King William III. The clans were, however, not successful in their enterprises, and they submitted to the authority of King William; when he retired to France. FRANCIS FERGUS O'FARRELL. _Appointed 1st March, 1689._ This officer was a decided advocate for the principles of the Revolution of 1688, and King William nominated him to the colonelcy of the SCOTS FUSILIERS, which corps he commanded in the Netherlands, under Prince Waldeck, and afterwards under the British monarch, who promoted him to the rank of brigadier-general. He served at the head of a brigade of infantry during the campaign of 1694; and was appointed governor of Deinse. He commanded the garrison of Deinse when that place was besieged, in July, 1695; and was dismissed the service, by sentence of a general court-martial, for surrendering without firing a shot. ROBERT MACKAY. _Appointed 13th November, 1695._ ROBERT MACKAY, third son of John, Lord Reay, was an officer in the Scots Brigade in the Dutch service, and accompanied the Prince of Orange to England in 1688. He was promoted captain of the grenadier company in Major-General Hugh Mackay's regiment, and served in Scotland in 1689. He distinguished himself at the battle of Killicrankie, where he received several wounds, and was left for dead on the field of battle. He, however, showed some signs of life and was removed to a cottage by the enemy, and eventually recovered. He was soon afterwards promoted to the rank of lieut.-colonel, and King William gave him the colonelcy of a newly raised Scots regiment (afterwards disbanded), from which he was removed, in 1695, to the TWENTY-FIRST FUSILIERS. His constitution had become debilitated by severe service and numerous wounds, and he died at Tongue, the seat of his family, in December, 1696. ARCHIBALD ROW. _Appointed 1st January, 1697._