the weak rule of Robert III. Archibald appeared to have strengthened his line's connection with that of the Royal Stewarts, when in 1390 he arranged the marriage of his son and heir, Archibald, Master of Douglas, to Princess Margaret, and in 1399 his daughter Marjorie to David Stewart, Duke of Rothesay; both of these spouses were children of Robert III, Rothesay being the heir apparent to the throne. Rothesay had already contracted to marry Elizabeth Dunbar, daughter of George I, Earl of March, who had paid a large sum for the honour. March, alienated by this breach of faith on the king's part, joined the English forces. In 1390 he captured Lochnaw Castle. Death The Earl of Douglas died at Threave Castle, around the Christmas of 1400, and was buried at Bothwell. Marriage and children Around 1362 Douglas married Joanna de Moravia, daughter of Maurice de Moravia, 1st Earl of Strathearn. They had five children: Archibald Douglas, who succeeded as 4th earl James Douglas, later the 7th earl Marjorie Douglas, married 1st David Stewart, Duke of Rothesay, 2nd Walter de Haliburton the Treasurer of Scotland Helen, married George de Lawedre of Haltoun, Provost of Edinburgh. Eleanor Douglas, married John de Dundas Lord Douglas had an illegitimate son: Sir William Douglas of Nithsdale (assassinated 1391), married Egidia Stewart daughter of Robert II References Notes Primary sources Brown, Michael, The Black Douglases, Tuckwell Press, East Linton, 1998 Fraser, Sir William, The Douglas Book (4 Vols). Edinburgh 1885 Fordun, John of, Chronica Gentis Scotorum, ed.Skene, W.F., Edinburgh 1871. Froissart Chronicles, trans. Lord Berners, ed. Macaulay, G.C. London 1904. MacDougall, Norman, An Antidote to the English — the Auld Alliance 1295-1560, Tuckwell Press, East Linton, 2001 Maxwell, Sir Herbert. A History of the House of Douglas (2 vols), Freemantle & Co., London 1902 Smith, J Stewart-, The Grange of St Giles. Edinburgh, 1898 George Crawfurd's Peerage, 1776 Secondary sources Nigel Tranter, The Stewart Trilogy, Dunton Green, Sevenoaks, Kent : Coronet Books, 1986. . Lords of Misrule, 1388-1396. A Folly of Princes, 1396-1402. The Captive Crown, 1402-1411. Attribution Earls of Douglas Earls of Wigtown History of Galloway Archibald Douglas, 3rd Earl of Douglas People of the Hundred Years' War 1328 births 1400 deaths 14th-century Scottish earls Lords of Galloway