It was indeed sufficiently dangerous; for, during the short visit just described, one of Dr.King's servants remarked the stranger's likeness to Prince Charles, whom he recognized from the common busts.
The occasion taken for breaking up the Stuart interest we shall tell in Dr.King's own words:--'When he (Charles Edward) was in Scotland, he had a mistress whose name was Walkinshaw, and whose sister was at that time, and is still, housekeeper at Leicester House.

Some years after he was released from his prison, and conducted out of France, he sent for this girl, who soon acquired such a dominion over him, that she was acquainted with all his schemes, and trusted with his most secret correspondence.

As soon as this was known in England, all those persons of distinction who were attached to him were greatly alarmed: they imagined that this wench had been placed in his family by the English ministers; and, considering her sister's situation, they seemed to have some ground for their suspicion; wherefore, they dispatched a gentleman to Paris, where the prince then was, who had instructions to insist that Mrs.Walkinshaw should be removed to a convent for a certain term; but her gallant absolutely refused to comply with this demand; and although Mr.M'Namara, the gentleman who was sent to him, who has a natural eloquence and an excellent understanding, urged the most cogent reasons, and used all the arts of persuasion, to induce him to part with his mistress, and even proceeded so far as to assure him, according to his instructions, that an immediate interruption of all correspondence with his most powerful friends in England, and, in short, that the ruin of his interest, which was now daily increasing, would be the infallible consequence of his refusal; yet he continued inflexible, and all M'Namara's entreaties and remonstrances were ineffectual.

M'Namara stayed in Paris some days beyond the time prescribed him, endeavouring to reason the prince into a better temper; but finding him obstinately persevere in his first answer, he took his leave with concern and indignation, saying, as he passed out, "What has your family done, sir, thus to draw down the vengeance of Heaven on every branch of it, through so many ages ?" It is worthy of remark, that in all the conferences which M'Namara had with the prince on this occasion, the latter declared that it was not a violent passion, or indeed any particular regard, which attached him to Mrs.Walkinshaw and that he could see her removed from him without any concern; but he would not receive directions, in respect to his private conduct, from any man alive.

When M'Namara returned to London, and reported the prince's answer to the gentlemen who had employed him, they were astonished and confounded.