In the years that followed the deposed king went from court to court of the German princes, seeking help to regain his throne, but meeting with scorn and contempt from some of them and refusal from all. He still retained much of the wealth of which he had robbed Copenhagen, and now, in despair of obtaining assistance, he took into his service a number of soldiers of fortune whom a treaty of peace had lately thrown out of employment. With these sons of adventure, twelve thousand in all, he ravaged Holland, which had recently afforded him refuge, doing so much mischief that he was at length bought off. The emperor, Charles V., then ruler over Holland and brother-in-law to the adventurer, paid him the fifty thousand gulden still due on his wife's dower and gave him twelve battle-ships in addition. The Dutch whom he was plundering helped in this as the easiest way to be quit of him, and, with a body of experienced troops, with funds and a fleet, the hope of winning back his old dominions arose in his soul. There were many malcontents then in Sweden, ready to aid him in an invasion, and the clergy and nobility of Norway, dissatisfied with Frederick's rule, subscribed large sums in money and plate for his aid. Finally, thus strengthened and encouraged, Christian set sail for the Northland with twenty-five ships and an army of eight thousand men. Unfortunately for him the elements proved adverse, a violent storm scattering the fleet and sending nearly half of it to the bottom. He had only fifteen ships and a reduced number of men when, in November, 1531, he landed at Obslo, Norway. The nobles and people, however, discontented with Frederick's government and eager for a king of their own choice, declared for him and at a diet held at Obslo proclaimed him king, only a few nobles dissenting. These, however, held the strongest fortresses in the kingdom. One of these was Magnus Gyllenstierna, governor of Aggerhus. Against this stronghold Christian led all his force and might easily have taken it, for it was lacking in provisions, but for a stratagem by which Magnus saved himself and his fortress. He sent word to Christian that the place was too weak for him to attempt to hold and that he had seen the king's success with pleasure; but, to save himself from the imputation of cowardice, he begged leave for time to ask King Frederick for assistance. If none came before the 1st of May he would willingly surrender the place. Adept in deceit as Christian was, he this time suffered himself to be tricked. At the suggestion of Magnus a thousand men were sent from Denmark, and led by secret paths over mountains and through forests in all haste, throwing themselves into Aggerhus while Christian was watching the seas to intercept them. In a rage he hurried back to renew the siege, but the shrewd commandant was now strong enough to defy him.