At Luss they were joined by the forces of Sir Humphrey Colquhoun, and James Grant, his son-in-law, with their followers, attired in the Highland dress of the period, which is picturesquely described.* The whole party crossed to Craig-Royston, but the MacGregors did not offer combat.
* "At night they arrived at Luss, where they were joined by Sir Humphrey Colquhoun of Luss, and James Grant of Plascander, his son-in-law, followed by forty or fifty stately fellows in their short hose and belted plaids, armed each of them with a well-fixed gun on his shoulder, a strong handsome target, with a sharp-pointed steel of above half an ell in length screwed into the navel of it, on his left arm, a sturdy claymore by his side, and a pistol or two, with a dirk and knife, in his belt."-- _Rae's History of the Rebellion,_ 4to, p.

287.
If we are to believe the account of the expedition given by the historian Rae, they leapt on shore at Craig-Royston with the utmost intrepidity, no enemy appearing to oppose them, and by the noise of their drums, which they beat incessantly, and the discharge of their artillery and small arms, terrified the MacGregors, whom they appear never to have seen, out of their fastnesses, and caused them to fly in a panic to the general camp of the Highlanders at Strath-Fillan.* The low-country men succeeded in getting possession of the boats at a great expenditure of noise and courage, and little risk of danger.
* Note C.The Loch Lomond Expedition.
After this temporary removal from his old haunts, Rob Roy was sent by the Earl of Mar to Aberdeen, to raise, it is believed, a part of the clan Gregor, which is settled in that country.

These men were of his own family (the race of the Ciar Mhor).

They were the descendants of about three hundred MacGregors whom the Earl of Murray, about the year 1624, transported from his estates in Menteith to oppose against his enemies the MacIntoshes, a race as hardy and restless as they were themselves.
But while in the city of Aberdeen, Rob Roy met a relation of a very different class and character from those whom he was sent to summon to arms.

This was Dr.James Gregory (by descent a MacGregor), the patriarch of a dynasty of professors distinguished for literary and scientific talent, and the grandfather of the late eminent physician and accomplished scholar, Professor Gregory of Edinburgh.