The Royalists lost in killed and prisoners five thousand men, their twelve guns, and all their baggage train, and what was of even greater importance, the king's private cabinet, which contained documents which did more to precipitate his ruin even than the defeat of his army. Here were found letters proving that while he had professed his desire to treat, he had no intention of giving way in the slightest degree. Here were copies of letters to foreign princes asking for aid, and to the Papists in Ireland, promising all kinds of concessions if they would rise in his favor. Not only did the publication of this correspondence and of the private letters between the king and queen add to the indignation of the Commons and to their determination to fight to the bitterest end, but it disgusted and alienated a vast number of Royalists who had hitherto believed in the king and trusted to his royal word. Among the prisoners taken at Naseby was Harry Furness, whose troop had been with Langdale's horse, and who, his charger having been shot, had fallen upon the field, his head being cut by the sweep of the sword of a Roundhead soldier, who struck at him as he was lying on the ground. Soon after the battle, when it became known what prisoners had been taken, he was visited by his friend Herbert. "We are changing sides, Herbert," Harry said, with a faint smile. "The last time we met you were nigh falling into the hands of the Royalists, now I have altogether fallen into yours." "Yes, and unfortunately," Herbert said, "I cannot repeat your act of generosity. However, Harry, I trust that with this great battle the war is nearly over, and that all prisoners now taken will speedily be released. At any rate, I need not assure you that you will have my aid and assistance in any matter." The Parliamentary leaders did not allow the grass to grow under their feet after Naseby. Prince Rupert, with considerable force, had marched to Bristol, and Fairfax and Cromwell followed him there. A considerable portion of the prisoners were sent to London, but some were retained with the army. Among these was Harry Furness, whom it was intended to confine with many others in some sure place in the south. Under a guard they were conducted to Reading, where they were for awhile to be kept. Essex and Cromwell advanced to Bristol, which they surrounded; and Prince Rupert, after a brave defense, was forced to capitulate, upon terms similar to those which had been granted by the king to the army of Lord Essex the year before. In his conduct of the siege the prince had certainly not failed. But this misfortune aroused the king's anger more than the faults which had done such evil service on the fields of Naseby and Marston, and he wrote to the prince, ordering him to leave the kingdom at once.