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The intriguing character of the Secretary of State, the Earl of Sunderland, whose duplicity in many instances cannot be doubted, and the mystery in which almost everything relating to him is involved, might lead us to suspect that the expressions point at some discovery in which that nobleman was concerned, and that Monmouth had it in his power to be of important service to James, by revealing to him the treachery of his minister. Such a conjecture might be strengthened by an anecdote that has had some currency, and to the truth of which, in part, King James's "Memoirs," if the extracts from them can be relied on, bear testimony. It is said that the Duke of Monmouth told Mr. Ralph Sheldon, one of the king's chamber, who came to meet him on his way to London, that he had had reason to expect Sunderland's co-operation, and authorised Sheldon to mention this to the king: that while Sheldon was relating this to his majesty, Sunderland entered; Sheldon hesitated, but was ordered to go on. "Sunderland seemed, at first, struck" (as well he might, whether innocent or guilty), "but after a short time said, with a laugh, 'If that be all he (Monmouth) can discover to save his life, it will do him little good.'" It is to be remarked, that in Sheldon's conversation, as alluded to by King James, the Prince of Orange's name is not even mentioned, either as connected with Monmouth or with Sunderland. But, on the other hand, the difficulties that stand in the way of our interpreting Monmouth's letter as alluding to Sunderland, or of supposing that the writer of it had any well-founded accusation against that minister, are insurmountable. If he had such an accusation to make, why did he not make it? The king says expressly, both in a letter to the Prince of Orange, and in the extract, from his "Memoirs," above cited, that Monmouth made no discovery of consequence, and the explanation suggested, that his silence was owing to Sunderland the secretary's having assured him of his pardon, seems wholly inadmissible. Such assurances could have their influence no longer than while the hope of pardon remained. Why, then, did he continue silent, when he found James inexorable? If he was willing to accuse the earl before he had received these assurances, it is inconceivable that he should have any scruple about doing it when they turned out to have been delusive, and when his mind must have been exasperated by the reflection that Sunderland's perfidious promises and self-interested suggestions had deterred him from the only probable means of saving his life.