Stuyvesant went to Hartford and settled by treaty all disputes with the New Englanders which had annoyed his predecessors. Then he turned his attention to the suppression of the expanding power and influence of the Swedes on the Delaware. The accession of a new queen to the throne of Sweden made it necessary to make a satisfactory adjustment of the long-pending dispute about the territory. Stuyvesant was instructed to act firmly but discreetly. Accompanied by his suite of officers, he went to Fort Nassau on the New Jersey side of the Delaware, whence he sent Printz, the governor of New Sweden, an abstract of the title of the Dutch to the domain and called a council of the Indian chiefs in the neighborhood. These chiefs declared the Swedes to be usurpers and by solemn treaty gave all the land to the Dutch. Then Stuyvesant crossed over and, near the site of New Castle in Delaware, built a fort, which he called Fort Cassimer. Governor Printz protested in vain. The two magistrates held friendly personal intercourse, and they mutually promised to "keep neighborly friendship and correspondence together." This strange friendly conquest was in the year 1651. The following year an important concession was made to the inhabitants of New Amsterdam. A constant war was waged between Stuyvesant and the representatives of the people called the "Nine." The governor tried to repress the spirit of popular freedom; the Nine fostered it. They wanted a municipal government for their growing capital and, fearing the governor, made a direct application to the states-general for the privilege. It was granted, and the people of New Amsterdam were allowed a government like the free cities of Holland, the officers to be appointed by the governor. Under this arrangement, New Amsterdam (afterward New York) was, early in 1653, organized as a city. Stuyvesant was very much annoyed by this "imprudent entrusting of power with the people." Stuyvesant was a royalist, and for years he struggled with the increasing spirit of republicanism, which was constantly growing among his people; but he was not troubled by his domestic affairs alone; his foreign relations were once more disturbed. Governor Printz returned to Sweden, and in his place the warlike magistrate John Risingh came to the Delaware with some soldiers under the bold Swen Schute, and appeared before Fort Cassimer demanding its surrender. The Dutch residents fled to the fort demanding protection; but Bikker the commander said: "I have no powder. What can I do?" After an hour's parley, Bikker went out, leaving the gate of the fort wide open, and shook hands with Schute and his men, welcoming them as friends. The Swedes fired two shots over the fort in token of its capture and then, blotting out the Dutch garrison, named it Fort Trinity, as the surrender was on Trinity Sunday, 1654.