In June 1751 she was appointed Keeper of the Privy Purse to the Princess of Wales, and superintendent of the education of the Princess Augusta, afterwards Duchess of Brunswick. She obtained this appointment, we are told, through the interest of Mr. Cresset, the confidential servant and Treasurer of the Princess of Wales, whose authority in the Court soon afterwards gave way to the ascendancy of Lord Bute; though Pitt imagined that here again he could trace the hand of Bolingbroke. 'However,' says Lord Camelford, 'thinking she could be useful to him in so important a post, he sought a reconciliation--he flattered, he menaced, he insulted, but was rejected.' Of these proceedings two records remain in letters which have already been published, but cannot be omitted here, as they are instinct with passion and light. Whether they answer to Lord Camelford's description must be left to the judgment of those who read them. That they are powerful, tender, and unaffected all must allow. They also contain quotations from the quarrels which are not devoid of interest. Ann had declared that William expected absolute deference and a blind submission to his will; and that he had in several conversations directly explained to her that, to satisfy him, she must live with him as his slave. On this point William admits that he did expect some measure of deference to his views, and that, living together, he thought she might shape her life in some degree to his. This seems to have been the real ground of separation. William wished to be master in his own house. Ann could brook no control. Perhaps the brother may have asked the sister to discontinue or relax her intimacy with the Bolingbrokes, as injurious and inconvenient to him, and Ann, we may guess, would curtly bid him mind his own business. But these are only probabilities. In the course of these proceedings we learn that William lost his temper, declaring that she had a bad head and a worse heart; for this he humbly begs her pardon. Another complaint of Ann's is easily explained. She says that William had been talking of the 200_l._ a year that he allowed her. William's answer makes it perfectly clear that he had been reproached with the fact of his sister's destitute condition, and that he had had to explain, in his own defence, that he gave her this income.