The young King, who saw only through the eyes of his favourite, was induced to comply with both proposals; and Marie de Medicis no sooner ascertained that the royal troops were about to march upon Angoulême, than she made preparations for defence. In order to do this more effectually she addressed autograph letters to the Ducs de Mayenne and de Rohan, to the Maréchal de Lesdiguières, and to several other great nobles, soliciting their support in the impending struggle; but with the sole exception of M. de Rohan, they all returned cold and negative replies, informing her that the duty which they owed to the King would not permit them to comply with her request; after which they forwarded her letters to the Court, together with the answers which they had made, thus purchasing their safety at the expense of their honour. The Duc de Rohan, on receiving her application, also declined to assist her, it is true; but he did so loyally and respectfully, assuring her Majesty that he greatly regretted she should so long have delayed requesting his co-operation, as he would have served her zealously and faithfully, whereas he was now no longer in a position to espouse her interests, the King having commanded him to remain in his government of Poitou in order to maintain peace in that province, a duty which his honour consequently enforced upon him; but declaring at the same time that even while obeying the commands of her son, he would not undertake anything inimical to her own interests, and entreating her to effect an understanding with the sovereign in order to avert the evils of a civil war, and to ensure to herself the liberty and safety which could alone enable her to rally about her person all those who were sincerely desirous of serving her. Although touched by the manliness and dignity of this reply, the Queen-mother bitterly felt the loss of such an ally; nor were her disappointment and mortification lessened when she discovered that the Maréchal de Schomberg, anxious to convince Louis of the extent of his zeal, and so to possess himself of the royal favour, had formed the design of blowing up the powder-magazine of Angoulême, and thus terminating the negotiation by a _coup de main_ of which she and her adherents were destined to be the victims. The project was indeed discovered and defeated, but the impression which it left upon her mind was one of gloom and discouragement.[28]