On August 20, 1643, a group of Siwanoy led by the sachemWampage massacred Anne Hutchinson's dissident settlement at Split Rock in revenge for New Netherland governor Willem Kieft's February massacres of Wappani refugees from Wecquaesgeek at Corlaer's Hook and Pavonia. Hutchinson was not at fault, yet, like thousands of Indians and a number of other colonists, she was caught up in the bloody reprisals which characterized the two year conflict. The Siwanoy attack killed Hutchinson, six of her children, and nine others.1
On June 27, 1654, Thomas Pell, a Connecticut physician, obtained title, in Connecticut, to a large amount of Siwanoy territory through a treaty with a number of sachems, including Wampage. This included the Pelham Islands and parts of the mainland Bronx and coastal Westchester. New Netherland authorities did not recognize this title, of course, accusing the New Englanders of continued encroachment upon Dutch territory. Pell's coup turned out to be decisive in New York history, as the 1664 English naval invasion force that conquered New Amsterdam was supported by a militia of Pell's colonists from Minneford Island.