Siwanoy Cheif Wampage I became a close friend of Thomas Pell I (first Lord of Pelham Manor), who was the Indian Commissioner in Fairfield, and Wampage I and Thomas Pell I concluded much business together. Wampage and 3 other sagamores sold 9,160 acres of land to Pell in 1654, including what is now Pelham Bay Park in the Bronx, and on March 10, 1658, he and Commissioner Pell negotiated the definitive treaty between the English and the Siwanoys, whereby their respective positions were delineated. (The Siwanoys remained in the area for another hundred years, until they eventually "melted away" by intermarriage with the English settlers. Around 1756, the remaining Wappinger and Mahicans in the area joined the Nanticoke, and with them were finally merged into the Delawares.)
The image of this document is from the only known surviving copy, which Thomas Pell sent to relatives in England.
Siwanoy Nation Historian
Cockho
Kamaque
Cockinsecawa
This wrightinge was signed & wittnessed Beffore A great multitude off Indyans & many English we who are under written do testify
Henry
Accorly William Newman