Caithness, for making peace with the Morays. In 1588 Castle Sinclair Girnigoe withstood a siege by the Earl of Sutherland and in 1590 George Sinclair, 5th Earl of Caithness invaded Sutherland which resulted in the Battle of Clynetradwell. On 3 April 1593, George, 5th Earl of Caithness resigned his earldom in return for novodamus and remainder to his son William Sinclair. On 11 December William Sinclair of Mey was knighted by King James VI of Scotland. 17th century and Civil War On 21 October 1601, Henry Sinclair, 6th Lord Sinclair died and was succeeded by grandson Henry. In 1606, George 5th Earl of Caithness, was by an Act of Parliament allowed to change the name of Girnigoe Castle to Sinclair Castle. See: Castle Sinclair Girnigoe. The Battle of Kringen took place on 26 August 1612 in Otta, Norway. George Sinclair was killed with most of his men in an ambush. In 1650 Major Sinclair assisted James Graham, 1st Marquess of Montrose at the Battle of Carbisdale where they were defeated. They escaped to Ardvreck Castle, but there they were betrayed by MacLeod of Assynt and were executed. Sir William Sinclair of Rosslyn was killed at the Battle of Dunbar (1650) and was the last knight to be buried in full armour below Rosslyn Chapel. General Monck sacked Rosslyn Castle but the Chapel was spared. In 1651, at the Battle of Worcester, John Sinclair, 10th Lord Sinclair was captured by Cromwell's forces and imprisoned in the Tower of London and then at Windsor Castle until 1660 when he was liberated by General Monck. In 1657, George Sinclair 6th Earl of Caithness was present when Oliver Cromwell was proclaimed Chief Magistrate of the three nations in Edinburgh. In 1680 a feud took place between George Sinclair of Keiss and Sir John Campbell of Glenorchy over the right to the lands and title of the earldom of Caithness. This resulted in the Battle of Altimarlach, where, legend has it that so many Sinclairs were killed that the Campbells were able to cross the river without getting their feet wet. Clearly, however, the Sinclairs had influence in high places as only a few years later, in 1681, they regained the earldom by an order of Parliament. In 1698, George Sinclair 7th Earl of Caithness died. He was succeeded by John Sinclair of Murchill (Murkle) 8th Earl, his cousin. 18th century and Jacobite risings During