twice under-secretary of state, from February 1681 to January 1683, under his cousin, Edward, Earl of Conway, and from Christmas 1688 to Michaelmas 1689. When Lord Rochester was lord high treasurer under James II, Gwyn was joint secretary to the treasury with Henry Guy, and when Rochester was made lord-lieutenant of Ireland in 1701 Gwyn was his chief secretary, and a privy councillor. At one time he served as a commissioner of public accounts. From June 1711 to August 1713 he was a commissioner of the board of trade, and he was then secretary at war until 24 September 1714, when he received a letter of dismissal from Lord Townshend. He was recorder of Totnes and steward of Brecknock. Works and correspondence The minutes of the business which he transacted during his periods of office were sold with the effects of Ford Abbey in 1846. He accompanied James on his expedition to the west in November 1688, and his diary of the journey was printed by C. T. Gatty in the Fortnightly Review, xlvi. 358–64 (1886). When the House of Lords met at the Guildhall, London, in December 1688, he acted as their secretary, and kept a journal of the proceedings. Several letters by Gwyn dated 1686 and 1687, one of which was written when he was setting out with Lord Rochester and James Kendall on a visit to Spa, are printed in the 'Ellis Correspondence' (ed. by Lord Dover), i. 170–171, 202–3, 253–4, 314–15. In 'Notes and Queries,' 2nd ser. xii. 44 (1861), is inserted a letter from him to Harley, introducing Narcissus Luttrell the diarist, and many other communications to and from him are referred to in the Historical MSS. Commission's reports. The constancy of his friendship with Rochester was so notorious that in the 'Wentworth Papers,' p. 163, occurs the sentence 'Frank Gwin, Lord Rotchester's gwine as they call him.' Family In 1690 Gwyn married his cousin Margaret Prideaux, third daughter of Edmund Prideaux, and his wife Amy Fraunceis, coheiress of John Fraunceis of Combe Florey, and granddaughter of Edmund Prideaux, attorney-general of Cornwall. They had four sons and three daughters, besides others who died young, and their issue is set out in the pedigree in John Hutchins's History of Dorset. He was succeeded in turn by his son Edward and William who were also Members of Parliament. By his marriage Gwyn eventually became owner of the