Russia was no longer occupied with the rebellion of the Poles, and the Northern Courts were evincing a strong disposition to draw together closely. Under these conditions, he regarded it as essential that France should maintain friendly relations with England. "It was a matter of far more real importance than the question of the fortresses."[181] But his endeavours to soothe the irritation of his government met with no success. He was instructed to announce in London that France, seeing that satisfaction was denied her in the affair of the fortress convention, would refuse to ratify the treaty of separation of November 15, 1831. Furthermore, Casimir Périer, who, on account of Sébastiani's state of health, had taken charge of the portfolio of Foreign Affairs, declared that, "in view of the general uncertainty respecting the course of events in Belgium and Holland, the signature of the proposed convention of disarmament must be postponed."[182] The French agents in the meanwhile had not been idle at Brussels. On December 12 General Tiburce Sébastiani, the brother of the minister, arrived. "Ostensibly," reported Adair, "he has come to visit this town and Antwerp, but his real purpose is to prevent the accession of the Belgian government to the fortress convention." This officer certainly brought a letter for Belliard containing instructions which justified the British minister's conclusions, but his mission appears also to have been connected with some unfounded rumour, which had reached the French government, that the Orangists were about to put into execution their designs against Leopold's throne.[183] That monarch now found himself once more, as he himself described it, "between the hammer and the anvil."[184] Louis Philippe[185] wrote indignantly complaining that the agreement of September 8, entered into with La Tour-Maubourg, had not been complied with. In vain Leopold produced the instructions, with which Goblet and Van de Weyer, who had negotiated the convention, had been furnished, and protested that the Belgian plenipotentiaries had been forced to sign, under the threat that the Powers would refuse to ratify the treaty of separation, should they persist in opposing their wishes with respect to the fortresses. General Belliard, at the same time, intimated that, were the Dutch again to attack Belgium, no assistance from France could be expected. To Adair, who, on the other hand, begged him to stand firm, Leopold had expressed his determination to disregard the French objections and to adhere to the convention. But at the threat that, were his Kingdom again to be overrun, France would leave him to his fate, his resolution broke down and Goblet was directed to announce in London that the Belgian ratification of the fortress agreement would be withheld.[186] Stockmar, writing from London, impressed upon King Leopold that his refusal to ratify the convention of December 14 would be eagerly seized upon by the