ARCHIBALD CAMPBELL, 3rd duke of Argyll (I 682–I 761), brother of the preceding, was born in June 1682. He served for a short time under the Duke of Marlborough. In 1705 he was appointed treasurer of Scotland, and in the following year was one of the commissioners for treating of the Union. Having been raised to the peerage of Scotland as earl of Islay, he was chosen one of the 16 peers for Scotland in the first Parliament of Great Britain. In 171I he was called to the privy council, and commanded the Royal Army at the battle of Sheriffmuir in 1715. He was appointed keeper of the privy seal in 1721, and was afterwards entrusted with the management of Scottish affairs to an extent which caused him to be called "king of Scotland." In 1733 he was made keeper of the great seal. Argyll was promi nently connected (with Duncan Forbes of Culloden) with the movement for consolidating Scottish loyalty by the formation of locally recruited Highland regiments. He collected one of the most valuable private libraries in Great Britain. He died sud denly April 15 1761, without legitimate issue.
The succession now passed to the descendants of the younger son of the 9th earl, the Campbells of Mamore; the 4th duke died in 177o, and was succeeded by his son JOHN, the 5th duke (1723 '806). He fought at Dettingen and Culloden. In the House of Commons he represented Glasgow from 1744 to 1761, and Dover, till 1766, when he was created an English peer as Baron Sundridge, the title by which till 1892 the dukes of Argyll sat in the House of Lords. In 1759 he had married the widowed duchess of Hamilton (the beautiful Elizabeth Gunning), by whom he had two sons and two daughters. The eldest of his sons, George (d. 1841), became 6th duke, and on his death was succeeded as 7th duke by his brother John (1777-1847), who from 1799-1822 sat in Parliament as member for Argyllshire. He was thrice married, and by his second wife, Joan Glassell (d. 1828), had two sons, the elder of whom (b. 1821) died in 1837, and two daughters, the second of whom died in infancy.