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.