James Gregory, who thus escaped being his kinsman's recruit, and in all probability his henchman, was afterwards Professor of Medicine in the College, and, like most of his family, distinguished by his scientific acquirements. He was rather of an irritable and pertinacious disposition; and his friends were wont to remark, when he showed any symptom of these foibles, "Ah! this comes of not having been educated by Rob Roy."

The connection between Rob Roy and his classical kinsman did not end with the period of Rob's transient power. At a period considerably subsequent to the year 1715, he was walking in the Castle Street of Aberdeen, arm in arm with his host, Dr. James Gregory, when the drums in the barracks suddenly beat to arms, and soldiers were seen issuing from the barracks. "If these lads are turning out," said Rob, taking leave of his cousin with great composure, "it is time for me to look after my safety." So saying, he dived down a close, and, as John Bunyan says, "went upon his way and was seen no more."*

* The first of these anecdotes, which brings the highest pitch of civilisation so closely in contact with the half-savage state of society, I have heard told by the late distinguished Dr. Gregory; and the members of his family have had the kindness to collate the story with their recollections and family documents, and furnish the authentic particulars. The second rests on the recollection of an old man, who was present when Rob took French leave of his literary cousin on hearing the drums beat, and communicated the circumstance to Mr. Alexander Forbes, a connection of Dr. Gregory by marriage, who is still alive.

We have already stated that Rob Roy's conduct during the insurrection of 1715 was very equivocal. His person and followers were in the Highland army, but his heart seems to have been with the Duke of Argyle's. Yet the insurgents were constrained to trust to him as their only guide, when they marched from Perth towards Dunblane, with the view of crossing the Forth at what are called the Fords of Frew, and when they themselves said he could not be relied upon.

This movement to the westward, on the part of the insurgents, brought on the battle of Sheriffmuir--indecisive, indeed, in its immediate results, but of which the Duke of Argyle reaped the whole advantage. In this action, it will be recollected that the right wing of the Highlanders broke and cut to pieces Argyle's left wing, while the clans on the left of Mar's army, though consisting of Stewarts, Mackenzies, and Camerons, were completely routed. During this medley of flight and pursuit, Rob Roy retained his station on a hill in the centre of the Highland position; and though it is said his attack might have decided the day, he could not be prevailed upon to charge. This was the more unfortunate for the insurgents, as the leading of a party of the Macphersons had been committed to MacGregor. This, it is said, was owing to the age and infirmity of the chief of that name, who, unable to lead his clan in person, objected to his heir-apparent, Macpherson of Nord, discharging his duty on that occasion; so that the tribe, or a part of them, were brigaded with their allies the MacGregors. While the favourable moment for action was gliding away unemployed, Mar's positive orders reached Rob Roy that he should presently attack. To which he coolly replied, "No, no! if they cannot do it without me, they cannot do it with me." One of the Macphersons, named Alexander, one of Rob's original profession, _videlicet,_ a drover, but a man of great strength and spirit, was so incensed at the inactivity of this temporary leader, that he threw off his plaid, drew his sword, and called out to his clansmen, "Let us endure this no longer! if he will not lead you I will." Rob Roy replied, with great coolness, "Were the question about driving Highland stots or kyloes, Sandie, I would yield to your superior skill; but as it respects the leading of men, I must be allowed to be the better judge."--"Did the matter respect driving Glen-Eigas stots," answered the Macpherson, "the question with Rob would not be, which was to be last, but which was to be foremost." Incensed at this sarcasm, MacGregor drew his sword, and they would have fought upon the spot if their friends on both sides had not interfered. But the moment of attack was completely lost. Rob did not, however, neglect his own private interest on the occasion. In the confusion of an undecided field of battle, he enriched his followers by plundering the baggage and the dead on both sides.