But, notwithstanding the inference thus deduced, the Duke of Hamilton continued to enjoy, in no ordinary degree, popular applause and the favour of Queen Anne, until his tragical death in 1712 occurring just before the Rebellion of 1715, spared him the perplexity of deciding on which side he should embark in that perilous and ill-omened insurrection. This celebrated statesman,--one who never entered into a new measure, nor formed a project, ("though in doing thereof," says Lockhart, "he was too cautious") that he did not prosecute his designs with a courage that nothing could daunt,--now determined to win over the Earl of Mar from the Duke of Queensbury. The Duke of Hamilton was the more induced to the attempt, from the frequent protestations made by the Earl of Mar of his love for the exiled family; and he applied himself to the task of gaining this now important ally with all the skill which experience and shrewdness could supply. Hamilton was considered invincible in such undertakings, and was master of a penetration which no one could withstand. "Never was," writes Lockhart, "a man so qualified to be the head of a party as himself; for he could, with the greatest dexterity, apply himself to, and sift through, the inclinations of different parties, and so cunningly manage them, that he gained some of all to his." But the Duke met in Lord Mar with one equally skilled in diving into motives, and in bending the will of others to his own projects. In the encounter of these two minds, the Duke is said to have been worsted and disarmed; and the Earl of Mar, by his insinuations, is suspected to have materially influenced the conduct of that great leader of party. "I have good reason to suppose," says Lockhart, "that his Grace's appearing with less zeal and forwardness in this ensuing than in former Parliaments, is attributable to some agreement passed between them two."[37]