Their Notions of Virtue and Vice are very different from the more civilized part of Mankind. They think it a most Sublime Virtue to pay a Servile and Abject Obedience to the Commands of their Chieftans, altho’ in opposition to their Sovereign and the Laws of the Kingdom, and to encourage this, their Fidelity, they are treated by their Chiefs with great Familiarity, they partake with them in their Diversions, and shake them by the Hand wherever they meet them.
The Virtue next to this, in esteem amongst them, is the Love they bear to that particular Branch of which they are a part, and in a Second Degree to the whole Clan, or Name, by assisting each other (right or wrong) against any other Clan with whom they are at Variance, and great Barbarities are often committed by One, to revenge the Quarrels of Another. They have still a more extensive adherence one to another as Highlanders in opposition to the People who Inhabit the Low Countries, whom they hold in the utmost Contempt, imagining them inferior to themselves in Courage, Resolution, and the use of Arms, and accuse them of being Proud, Avaricious, and Breakers of their Word. They have also a Tradition amongst them that the Lowlands were in Ancient Times, the Inheritance of their Ancestors, and therefore believe they have a right to commit Depredations, whenever it is in their power to put them in Execution.
General George Wade, Report, &c., Relating to the Highlands, 1724.