Though the friends of the earl interceded on his behalf,[636] the king had no alternative but to complete what he had begun. After what he had done there could be no hope of reconciliation with the earl. Geoffrey was offered the usual choice; either he must surrender his castles, or he must go to the gallows. Taken to London, he was clearly made, according to the practice in these cases, to order his own garrison to surrender to the king. Thus he saw the fortress which he had himself done so much to strengthen, the source of his power and of his pride, pass for ever from his grasp. He had also to surrender, before regaining his freedom, his ancestral Essex strongholds of Pleshy and Saffron Walden.[637] The earl's impotent rage when he found himself thus overreached is dwelt on by all the chroniclers.[638] The king's move, moreover, had now forced his hand, and the revolt so carefully planned could no longer be delayed, but broke out prematurely at a time when the Empress was not in a position to offer effective co-operation. We must now return to the doings of Nigel, Bishop of Ely. That prelate had for a year (1142-43) been peacefully occupied in his see. But at the council of 1143 his past conduct had been gravely impugned. Alarmed at the turn affairs were taking, he decided to consult the Empress.[639] He must, I think, have gone by sea, for we find him, on his way at Wareham, the port for reaching her in Wiltshire. Here he was surprised and plundered by a party of the king's men.[640] He succeeded, however, in reaching the Empress, and then returned to Ely. He had now resolved to appeal to the pope in person, a resolve quickened, it may be, by the fact that the legate, who was one of his chief opponents, had gone thither in November (1143). With great difficulty, and after long debate, he prevailed on the monks to let him carry off, from among the remaining treasures of the church, a large amount of those precious objects without the assistance of which, especially in a doubtful cause, it would have been but lost labour to appeal to the heir of the Apostles. As it was Pope Lucius before whom he successfully cleared his character, and as Lucius was not elected till the March of the following year (1144), I have placed his departure for Rome subsequent to that of the legate. He may, of course, have arrived there sooner and applied to Cœlestine without success, but as that pontiff favoured the Empress, this is not probable. Indeed, the wording of the narrative is distinctly opposed to the idea.[641] In any case, my object is to show that the period of his absence abroad harmonizes well with the London Chronicle, which places Geoffrey's revolt about the end of the year. For the bishop had been gone some time when the earl obtained possession of Ely.[642]