It happened that, during the king's illness, Somerset had been arrested in the queen's great chamber, and sent to keep his Christmas in the Tower, as a preliminary to his being brought to trial. No sooner, however, did Margaret regain authority, than her favorite was set at liberty; and people learned with indignation that, instead of having to answer for his offenses against the state, the unworthy noble was to be appointed Captain-general of Calais. After this, the Yorkists became convinced that the sword alone could settle the controversy; and, about the spring of 1455, the duke, repairing to Ludlow, summoned, for the second time, his retainers, and prepared to display his banner in actual war against the royal standard of England. He had soon the gratification of being joined by the two great Earls of Salisbury and Warwick, by John Mowbray, Duke of Norfolk, and by other men whose rank and nobility lent lustre to the cause. Having armed and arrayed the Marchmen of Wales, York advanced toward the capital. War was now inevitable; and Somerset did not shrink from a conflict with the prince whose life he had sought and whose vengeance he had defied. A Lancastrian army was forthwith assembled; and at its head Henry and Somerset, accompanied by many men of influence, marched from London to face the Yorkists in fight. Sir Philip Wentworth bore the royal standard; and with the king went Humphrey, Duke of Buckingham, and his son, Earl Stafford; James Butler, chief of the house of Ormond, whom Henry had created Earl of Wiltshire; Thomas, Lord Clifford, from the Craven; and Hotspur's son, Henry Percy, Earl of Northumberland, who, having in youth been restored by Henry the Fifth, now went out, at the age of threescore, to fight for the crown worn by Henry's son. The people, however, held aloof from the contest; and the army of the Red Rose, composed entirely of nobles, with their knights, and squires, and fighting men, does not appear to have exceeded two thousand in number. The king had not far to go in search of his kinsman. After passing the night of Thursday, the 22d of May, at Watford, and proceeding next morning to St. Albans, the Lancastrians, when about to continue their march, perceived that the hills in front of them were covered with armed men, who moved rapidly in battle order toward the ancient historic town. On observing the approach of the Yorkist foe, the Lancastrian leaders halted, set up the royal standard, placed troops under the command of Lord Clifford to guard the barriers, and sent the Duke of Buckingham to confer with the White Rose chiefs, who had encamped at Heyfield.