The barons returned to the city in triumph, bringing the king and Richard, king of the Romans, in their train. Edward had been placed in custody in Dover Castle, pending negotiations. Henry was lodged in the Bishop’s Palace, whilst Richard was committed to the Tower. An agreement was drawn up which secured the safety of the king, and left all matters of dispute to be again referred to arbitration.(252) This treaty formed the basis of a new system of government, and led to the institution of Simon de Montfort’s famous Parliament. The short respite—for it proved to be no more—from civil war was welcomed by the Londoners. The city had been drained of a large part of its population in order to increase the Earl of Leicester’s army, and business had been seriously disturbed. For the past year no Court of Husting had been held, and therefore no wills or testaments had received probate; whilst all pleas of land, except trespass, had to stand over until the country became more settled.(253) (M158) The parliament which Leicester summoned to meet on the 20th January, 1265, marked a new era in parliamentary representation. It was the first parliament in which the merchant and the trader were invited to take their seats beside the baron and bishop. Not only were the shires to send up two representatives, but each borough and town were to be similarly privileged.(254) Terms of reconciliation between king and barons were arranged, and once more the mayor and aldermen did fealty to Henry in person in St. Paul’s church. Fitz-Thomas, who for the fourth time was mayor, was determined to lose nothing of his character for independence; "My lord," said he, when taking the oath, so long as you are willing to be to us a good king and lord, we will be to you faithful and true."(255) (M159) Peace was not destined to last long. Dissensions quickly broke out between Gilbert, Earl of Gloucester, and Simon de Montfort, owing in a great measure to jealousy. Gloucester insisted that the Mise of Lewes and the Provisions of Oxford had not been properly observed, hinting unmistakably at the foreign birth and extraction of his rival. Endeavours were made to arrange matters by arbitration, but in vain; and by Whitsuntide the two earls were in open hostility. Gloucester was joined by Edward, who had succeeded by a ruse in escaping from Hereford, where he was detained in honourable captivity.(256) (M160) With their combined forces they fell on Earl Simon at Evesham and utterly defeated him (4 Aug.). Simon himself was killed, and his body barbarously mutilated.(257) The king, who was in the earl’s camp, only saved himself by crying out in time "I am Henry of Winchester, your king." Whilst the battle was raging the city was visited with a terrible thunderstorm—an evil omen of the future.