Leaving a governor in Waterford, Henry then led the bulk of his army to Dublin, where he received the submissions of O'Rourke and of the chiefs of Leinster and Uriel. Hugo de Lacy and William Fitz-Adelm were sent to meet Roderic at the Shannon, and the monarch of Ireland acknowledged himself a tributary and vassal of the King of England. Ulster still held out; for the submission of the nominal head king can in no way be held to bind the chiefs, much less the people, of his own province, and certainly not those of all Ireland. Giraldus does not venture to advance any such theory, and yet Hooker, who translated his work in Elizabeth's time, coolly interpolates the statement that 'by him and his submission all the residue of the whole land became the King's subjects, and submitted themselves.' The synod which met at Cashel under the legate's presidency did what was possible for the Church to do in strengthening Henry's pretensions. The King held a court at Dublin during the winter of 1171 and 1172. His temporary palace, erected outside the walls on the ground now occupied by the southern side of Dame Street, was built of polished wicker-work, after the manner of the country. Here he kept Christmas in state, and invited the Irish chiefs to share his feast. They admired the King's grandeur, and were by him persuaded to eat crane's flesh, which the Normans thought a delicacy, but which the Irish had hitherto loathed. The winter was so stormy that there was scarcely any communication with England, and Henry's pleasure in his new acquisition must have been darkened by the sense of impending retribution for the recent murder of Becket. [Sidenote: Henry's warlike preparations. He distrusts the adventurers.] From the preparation which he made for the invasion of Ireland, it seems clear that the King profoundly distrusted the adventurers who had insisted on winning him a new realm. Vast stores of provisions, a great number of hand-mills, artisans for building bridges, horses, and tools for building or trenching, might indeed have been required for a war against the natives. But the Irish had no fortresses, and wooden castles, of which we also read, can only have been intended for attacking the port-towns which Earl Richard had promised to give the King, and which were already in Norman hands. Henry saw enough of Ireland to know that he had really nothing to fear from the adventurers. Dermod MacMurrough was dead before his arrival, and it was clear that Earl Richard would have enough to do in maintaining his wife's monstrous claim without doing anything to offend his own sovereign.