But the consent of Marguerite herself was no less important; and with a view to obtain this, the minister addressed to her a letter, in which he expressed his ardent desire to effect a reconciliation between herself and the King, in order that the prayers of the nation might be answered by the birth of a Dauphin; or, should she deem such an event impossible, to entreat of her to pardon him if he ventured to take the liberty of imploring her Majesty to make a still greater sacrifice.
Sully had felt that it was unnecessary to explain himself more clearly, as a reconciliation between Henri IV and his erring consort had, from the profligate life which she was known to have led at Usson, become utterly impossible; nor could she doubt for an instant the nature of the sacrifice which was required at her hands.

It was not, therefore, without great anxiety that he awaited her reply, which did not reach him for the space of five months; at the expiration of which period he received a letter, wherein she averred her willingness to submit to the pleasure of the King, for whose forbearance she expressed herself grateful; offering at the same time her acknowledgments to the Duke himself for the interest which he exhibited towards her person.

From this period a continued correspondence was maintained between the exiled Queen and the minister; and she proved so little exacting in the conditions which she required as the price of her concession, that the affair would have been concluded without difficulty, had not the favourite, who was privy to the negotiation, calculating upon her influence over the mind of the monarch, suddenly assumed an attitude which arrested its progress.
For a considerable time she had aspired to the throne; but it was not until she learnt that the agents of the King in Rome were labouring to effect the dissolution of his marriage with Marguerite de Valois, and that the Duc de Luxembourg[48] was also about to visit the Papal Court in order to hasten the conclusion of the negotiations, that she openly declared her views to Sillery,[49] whom she knew to be already well affected towards her, declaring that should he be instrumental in inducing the King to make her his wife, she would pledge herself to obtain the seals for him on his return from Rome, as well as the dignity of chancellor so soon as it should be vacant.[50] Sillery, whose ambition was aroused, was not slow to obey her wishes; and, finding the Pope unwilling to lend himself to the haste which was required of him, he not only informed him privately that, in the event of a divorce, his royal master was ready to espouse the Princesse Marie de Medicis, his kinswoman (although at this period Henry evinced no inclination towards such an alliance), but even when he discovered that his Holiness remained unmoved by this prospect of family aggrandizement, he ventured so far as to hint, in conjunction with the Cardinal d'Ossat, that it was probable, should the Pontiff continue to withhold his consent to the annullation of the King's present marriage, he would dispense with it altogether, and make the Duchesse de Beaufort Queen of France: a threat which so alarmed the sovereign-prelate that, immediately declaring that he placed the whole affair in the hands of God, he commanded a general fast throughout Rome, and shut himself up in his oratory, where he continued for a considerable time in fervent prayer.

On his reappearance he was calm,[51] and simply remarked: "God has provided for it." A few days subsequently a courier arrived at Rome with intelligence of the death of the Duchess.
Meanwhile Gabrielle, by her unbridled vanity, had counteracted all the exertions of her partisans.

Aware of her power over the King, and believing that this divorce from Marguerite once obtained, she should find little difficulty in overcoming all other obstacles, she was unguarded enough prematurely to assume the state and pretensions of the regality to which she aspired, affecting airs of patronage towards the greatest ladies of the Court, and lavishing the most profuse promises upon the sycophants and flatterers by whom she was surrounded.