The kind and once honourable Rob Roy was now driven to desperation. His natural capacity for warlike affairs had been improved in the collection of the black mail, or protection fees; a service of danger, in which many a bloody conflict with freebooters had shown the Macgregors of what materials their leader was composed. The black mail was a private contribution, often compulsatory, for the maintenance of the famous black watch, an independent corps of provincial militia, and so called from the colour of their dress, in contradistinction to the red soldiers, or _leidar dearag_. "From the time they were first embodied," writes General Stewart, "till they were regimented, the Highlanders continued to wear the dress of their country. This, as it consisted so much of the black, green, and blue tartan, gave them a dark and sombre appearance in comparison with the bright uniform of the regulars, who, at that time, had coats waistcoats, and breeches of scarlet cloth. Hence the term _dhu_, or black, as applied to this corps."[107] In collecting both the imposts laid on for the maintenance of this corps, and in enforcing the black mail, Rob Roy had already gained the confidence of the better classes, whilst, by his exploits, he had taught the freebooter to tremble at his name. His journeys to England had not, either, been unprofitable to him in gaining friends. By a strict regard to his word, a true Highland quality, he had gained confidence; whilst his open and engaging demeanour had procured him friends. Soon after his expulsion from his property, Rob Roy travelled into England to collect a sum of money which was due to him. On returning through Moffat, his generous indignation was aroused by seeing the penalty of the law inflicted upon a young girl for fanaticism: two of her kinsmen had already suffered. As a party of soldiers were preparing to carry the girl, bound hand and foot, to a river, Rob Roy interposed; and, receiving an insolent reply, he sprang upon the soldiers and in an instant released the young woman, by plunging eight of her guards into the water. He then drew his claymore, and cut the cords which bound the intended victim. A short skirmish left him master of the field.