In a very short time after this, however, Warwick came back again with a large armed force, which he had organized at Calais, and landed in the southern part of England. He marched toward London, carrying all before him. It was now his party's turn to be victorious; for by the operation of that strange principle which seems to regulate the ups and downs of opposing political parties in all countries and in all ages, victory alternates between them with almost the regularity of a pendulum. The current of popular sentiment, which had set so strongly in favor of the queen's cause only a short year before, appeared to be now altogether in favor of her enemies. Every body flocked to Warwick's standard as he marched northwardly from the coast toward London, and at London the people opened the gates of the city and received him and his troops as if they had been an army of deliverers. [Sidenote: Northampton.] [Sidenote: The king made captive.] Warwick did not delay long in London. He marched to the north to meet the queen's troops. Another great battle was fought at Northampton. Margaret watched the progress of the fight from an eminence not far distant. The day went against her. The result of the battle was that the poor king was taken prisoner the second time and carried in triumph to London. The captors, however, treated him with great consideration and respect--not as their enemy and as their prisoner, but as their sovereign, rescued by them from the hands of traitors and foes. The time had not even yet come for the York party openly to avow their purpose of deposing the king. So they conveyed him to London, and lodged him in the palace there, where he was surrounded with all the emblems and marks of royalty, but was still, nevertheless, closely confined. [Sidenote: Parliament summoned.] [Sidenote: The king.] The Duke of York then summoned a Parliament, acting in the king's name, of course, that is, requiring the king to sign the writs and other necessary documents. It was not until October that the Parliament met. During the interval the king was lodged in a country place not far from London, where every effort was made to enable him to pass his time agreeably, by giving him an opportunity to hunt, and to amuse and recreate himself with other out-door amusements. All the while, however, a strict watch was kept over him to prevent the possibility of his making his escape, or of the friends of the queen coming secretly to take him away. As for the queen and the little prince, none knew what had become of them. [Sidenote: The duke's pretensions.]