Full of this scheme, he summoned a congress of European powers at Mantua, which proved one of the most interesting assemblages recorded in mediæval history, and offered to Christendom the rare spectacle of a pontiff engaged in reconciling his universal flock. From the British Isles no adequate response answered his summons, "England being hopelessly convulsed by civil broils, and Scotland hidden in the ocean depths." His self-imposed task including the arrangement of all disputes, those of the rival Lords of Urbino and Rimini attracted early notice. Sigismondo attended at Mantua in person to plead his cause: that of Federigo, who reluctantly consented to transact with one whom he well knew no award, no promise, could bind, was conducted by an envoy. The treachery of the former being made manifest, he was condemned by the Pope to a pecuniary mulct, and, failing payment, to the surrender of some fastnesses in security. Thereupon new difficulties arose, Malatesta avowing himself as yet unconquered, and ready to brave extremities rather than accept the proffered terms. His swaggering was thus checked by Pius:--"Hold your peace; our care is not for you, but for your house: our pity belongs to your subjects, not yourself, whose manner of life merits no commiseration. However you may defend it by a multitude of words, your whole life tells against you, and your sole plea is upon the deeds of an ancestry deserving well of the Romish Church. Hence is it that we seek to pacify your foes; and if you now resile from what is fair and equitable, we shall leave you in the slough wherein we found you: nor would it surprise us were the divine mercy to permit the poor to be afflicted for a season, that you may finally expiate your guilt by a bloody end, or by a wretched and impoverished exile." Daunted by these words, Sigismondo succumbed to terms approaching the award; but the other party, elated by success, would make no concession, though the Pontiff, indignant at such clinging to victory rather than conciliation, strove to settle the points still at issue.[*97] It was in this state of matters that he indited the following brief. [Footnote *97: Pius II. hated Sigismondo for his supposed treachery to Siena quite as much as Federigo did.] "To Federigo, Count of Montefeltro, &c.