The Diet of Coblenz assembled on the 13th December. The envoys of the Elector Palatine, the prince-bishops of Maintz, Cologne, and of Trier, the princes and nobles of the Upper and Lower Rhine and of Westphalia appeared. Francis of Waldeck, unable to be present in person, sent deputies to represent him.[228] [228] _Ibid._ p. 114. These deputies having announced that the cost of the siege had already amounted to 700,000 florins, besought the assembled princes to combine to terminate this disastrous war. A long deliberation followed, and the principle was admitted that as the establishment of an Anabaptist kingdom in Münster would be a disaster affecting the whole empire, it was just that the bishop should not be obliged to bear the whole expenses of the reduction of Münster. The Elector John Frederick of Saxony, though not belonging to the three circles convoked, through his deputies sent to the Diet, promised to take part in the extirpation of the heretics.[229] It was finally agreed that the bishop should be supplied with 300 horse soldiers, 3000 infantry, and that an experienced General, Count Ulrich von Ueberstein, should command them and take the general conduct of the war.[230] [229] _Ibid._; Sleidan, p. 419; Heresbach, p. 132. [230] Sleidan, p. 419. The monthly subsidy of 15,000 florins was also promised to be contributed till the fall of Münster. It was also agreed that the prince-bishop should be guaranteed the integrity of his domains; that each prince, Catholic or Protestant, should use his utmost endeavours to extirpate Anabaptism from his estates; that the Bishop of Münster should request Ferdinand, King of the Romans, and the seven Electors, to meet on the 4th April, at Worms, to consult with those then assembled at Worms on measures to crush the rebellion, to divide the cost of the war, and to punish the leaders of the revolt at Münster. Lastly, the Diet addressed a letter to the guilty city, summoning it to surrender at discretion, unless it were prepared to resist the combined effort of all estates of the empire. But if the princes were combining against the Anabaptist New Jerusalem, the sectarians were in agitation, and were arming to march to its relief from all sides, from Leyden, Freisland, Amsterdam, Deventer, from Brabant and Strassburg. The Anabaptists of Deventer were on the point of rising and massacring the "unbelievers" in this city, and then marching on Münster, when the plot was discovered, and the four ringleaders were executed. The vigilance of the Regent of the Netherlands prevented the adherents of the mystic sect, who were then very numerous, from rolling in a wave upon Westphalia, and sweeping the undisciplined Episcopal army away and consolidating the power of their pontiff-king.