 Meeting at Hartford, the commission and Dutch Governor-General Peter Stuyvesant negotiated a formal boundary line that essentially confirmed, to English benefit, English claims to what is now the state of Connecticut as well as eastern Long Island.In 1658, Prence was appointed to a special commission to mediate a border dispute between Massachusetts and Connecticut.The matter concerned Massachusetts territory in what is now Stonington, Connecticut that it had taken as part of the spoils of the Pequot War.