Pluscardine was then joined by his nephew, Lord Reay, at the head of three hundred men, which increased his force to eight or nine hundred. General Middleton and Lord Ogilvie, having brought up their forces, Mackenzie advanced into Badenoch, with the view of raising the people in that and the neighbouring districts, where he was joined by the Marquis of Huntly, formerly Lord Lewis Gordon, and they at once attacked and took the Castle of Ruthven. After this they were pressed closely by Leslie, and fell down from Badenoch to Balvenny Castle, whence they sent General Middleton and Mackenzie to treat with Leslie, but before they reached their destination, Carr, Halket, and Strachan, who had been in the North, made a rapid march from Fortrose, and on the 8th of May surprised Lord Reay with his nine hundred followers at Balvenny, with considerable loss on both sides. Eighty Royalists fell in the defence of the castle. Carr at once dismissed the Highlanders to their homes on giving their oath never again to take up arms against the Parliament, but he detained Lord Reay and some of his kinsmen, Mackenzie of Redcastle, and a few leaders of that name, and sent them prisoners to Edinburgh. Having there given security to keep the peace in future, Lord Reay, Ogilvy, Huntly, and Middleton were forgiven, and allowed to return home, Roderick Mackenzie of Redcastle, being the only one kept in prison, until he was some time after released, through the influence of Argyll, on payment of a fine of seven thousand merks Scots. Carr now returned to Ross and laid siege to Redcastle, the only stronghold in the North which still held out for the Royal cause. The officer in charge recklessly exposed himself on the ramparts, and was pulled down by a well-directed shot from the enemy. The castle was set on fire by the exasperated soldiers. Leslie then placed a garrison in Brahan and Chanonry Castles, and returned south. The garrisons were then expelled, some of the men hanged, the walls demolished, and the fortifications razed to the ground. Thus ended an insurrection which probably would have had a very different result had it been delayed until the arrival of Montrose. The same year General Leslie himself came to Fortrose with nine troops of horse, and forwarded detachments to Cromarty and "Seaforth's strongest hold" of Ellandonnan Castle.