Graeber / Wengrow 177-8: "[S]ettlers in different parts of North America referred to a whole variety of things as 'Indian money.' Often these were shell beads or actual shells. But in almost every case, the term is largely a projection of European categories on to objects that look like money, but really aren't. Perhaps the most famous of these, wampum, did eventually come to be used as a trade currency in transactions between settlers and indigenous peoples of the Northeast [...] In dealings between indigenous people, however, it was almost never used to buy or sell anything. Rather, it was employed to pay fines, and as a way of forming and remembering compacts and agreements."