by Campbell forces seeking revenge. By 1 June 1646 the Campbells brought cannon forward to shell the Lamont strongholds. Two days later Sir James Lamont, in a written agreement of quarter and liberty for himself and his followers, surrendered and persuaded the other garrison at Ascog Castle to likewise lay down arms and surrender to the Campbells. Although the Campbells had agreed to the Lamonts terms of surrender, they immediately took the surrendered garrisons to Dunoon by boat. The Lamont strongholds were then looted and burnt to the ground. Sir James and his closest kin were shipped to Inveraray Castle, although he was held in the dungeons of Dunstaffnage Castle for the next five years. At Inverary, Sir James was forced to sign over all of the Lamont lands to Clan Campbell. In the churchyard at Dunoon, about a hundred Lamonts were sentenced to death and executed. Thirty-six of the clan's high-ranking gentlemen were hanged from a tree in the churchyard, cut down and then buried either dead or alive in a common grave. After languishing in captivity for years, Sir James Lamont was brought to Stirling Castle in 1651 to answer for his actions with Alasdair MacColla for their devastations in Argyll. Lamont was eventually spared trial though, when King Charles II led his ill-fated Scots forces into England to be later defeated at the Battle of Worcester. Lamont was finally released when the forces of Oliver Cromwell took Stirling. Cromwell's triumph also invalidated the "contract" that Sir James was forced to sign in captivity, and Clan Lamont regained its lands. It has been reputed that the total damage inflicted by the Campbells upon the Lamont estates was in excess of £600,000 Scots (£50,000 sterling). Argyll himself was able to recover £2,900 Scots (almost £245 sterling) for the entertainment and lodging of the Lamont chief while in captivity. In 1661, the ringleader of the Dunoon Massacre, Sir Colin Campbell, was brought to justice. He stood trial on charges of High Treason, was found guilty, and then beheaded. 18th century Clan Lamont, though they still retained their lands, were functionally incapacitated in the 18th century. Their holdings in Cowal were surrounding by strong Campbell fortresses, and thus, the largely Roman Catholic Lamonts were unable to travel north and participate in the Jacobite Rising of 1715 or the Jacobite Rising of 1745. Since the Lamonts did not participate in the Jacobite