By a commission dated the same day, Sir Roderick, along with Simon Lord Lovat, and Urquhart of Cromarty, is appointed, for the trial in the Burgh of Inverness of all resetters within thc Sheriffdom of the county of any traitors in the Isles, the commission to last for one year. In 1618, along with Grant of Grant, he assisted the Mackintosh against the Marquis of Huntly. On the 18th of June, 1622, he is one of the chiefs named in a commission against the Camerons, among the others being Mackintosh of Mackintosh, Sir Roderick Macleod, XIII. of Harris, Grant of Grant, Sir John Campbell of Calder, John Grant of Glenmoriston, Patrick Grant of Ballindalloch, and John Macdonald, Captain of Clanranald. [See Mackenzie's "History of the Camerons," p. 86.] At the death of Kenneth, Lord Kintail, the estates were very heavily burdened in consequence of the wars with Glengarry and various family difficulties and debts. His lordship, in these circumstances, acted very prudently, as we have seen, in appointing his brother, Sir Roderick Mackenzie I. of Coigeach - in whose judgment he placed the utmost confidence - Tutor to his son and successor, Lord Colin. Knowing the state of affairs - the financial and numberless other difficulties which stared him in the face, at the same time that the family were still much involved with the affairs of the Lewis, and other broils on the mainland - Sir Roderick hesitated to accept the great responsibilities of the position, but, to quote one of the family manuscripts, "all others refusing to take the charge he set resolutely to the work. The first thing he did was to assault the rebels in the Lewis, which he did so suddenly, after his brother's death, and so unexpectedly to them, that what the Fife Adventurers had spent many years and much treasure in without success, he, in a few months, accomplished; for having by his youngest brother Alexander, chased Neil, the chief commander of all the rest, from the Isle, pursued him to Glasgow, where, apprehending him, he delivered him to the Council, who executed him immediately. He returned to the Lewis, banished those whose deportment he most doubted, and settled the rest as peaceable tenants to his nephew; which success he had, with the more facility, because he had the only title of succession to it by his wife, and they looked on him as their just master. From thence he invaded Glengarry, who was again re-collecting his forces; but at his coming they dissipated and fled. He pursued Glengarry to Blairy in Moray, where he took him; but willing to have his nephew's estate settled with conventional right rather than legal, he took Low-countrymen as sureties for Glengarry's peaceable deportment, and then contracted with him for the reversion of the former wadsets which Colin of Kintail had acquired of him, and for a ratification and new disposition of all his lands, formerly sold to Colin, and paid him thirty thousand