 One of Dutch Director Peter Stuyvesant's first actions was to strengthen his claim to Greenwich to prevent English colonies from establishing themselves closer to the Dutch on Manhattan.He received title to all the land between the west bank of the Mianus River and Stamford's Mill River, (natively called the Seweyruc), and he confiscated the original purchase property in the process.Angry Stamford demanded renegotiation of the border and in 1650, The Treaty of Hartford occurred which weakened Dutch control.