Long Island and Rhode Island. In 1609, the English navigator Henry Hudson explored the harbor and purportedly landed at Coney Island. Adriaen Block followed in 1615 and is credited as the first European to determine that both Manhattan and Long Island are islands. Native American land deeds recorded by the Dutch from 1636 state that the Indians referred to Long Island as "Sewanhaka" ("Sewanhacky" and "Sewanhacking" were other spellings in the transliteration of Lenape). "Sewan" was one of the terms for wampum (commemorative stringed shell beads, for a while also used as currency by colonists in trades with the Lenape), and is
Black-Dutch identifying as "Black Dutch" may have originated during and after the 1830s Indian Removal era. {citation needed} They may have attempted to "pass" and avoid being removed to Indian Territory or stigmatized by what became a majority Anglo-American society. Some Native Americans, mainly from the Five Civilized Tribes of the Southeast, claimed "Black Dutch" or "Black Irish" heritage in order to purchase land in areas which United States treaties and other laws had reserved for people of European descent. Once they owned the land, such families who had escaped forced removal would not admit to their Native American heritage, for