"So far," says Hume, "the Queen of Scots seemed plainly to have the advantage in the contest; and the English Commissioners might have been surprised, that Murray had made so weak a defence." The truth is, that not only were the English Commissioners surprised, but the Regent himself felt painfully conscious, that he had entirely failed to offer even a plausible pretext for the dethronement of his sister, and his own usurpation. Elizabeth also, anxious as she was to befriend him, saw that she would be imperatively required, by every principle of justice and good government, to take measures against him, were the discussion allowed to terminate at the point to which it had now been brought. Means were therefore taken to inform Murray, that unless he was able to strengthen his case, and to bring his charges more directly home, the matter would in all probability go against him. Upon this the Regent held a consultation with his friends, Maitland and Buchanan, and the necessity of bringing into play a new device, which had been prepared as a corps-de-reserve, was by all of them felt and acknowledged. Though no evidence had been adduced against her, Mary had already been accused by her brother of having had a share in the murder of Darnley. But as the charge was made soon after his return from France, it was strongly suspected to have been invented only to justify himself for retaining her in Loch-Leven. Now, however, seeing the emergency of his affairs, he determined that something like evidence of its truth should be produced. This evidence consisted of a collection of certain letters and sonnets, alleged to be in the Queen's own hand, and addressed to the Earl of Bothwell, containing passages which testified at once her love for him, and her guilt towards Darnley. But here the question very naturally occurs, why these important documents should not have been brought forward in the earlier part of the conference; and as Robertson, in endeavouring to account for the delay, appears to have fallen into a mistake, it will be worth while examining, for a moment, the soundness of his hypothesis.