What is the name of the culture cultivated in the area of Duncan Farm and Golden Eagle?
Duncan Farm (Grafton, Illinois): Duncan Farm is an archaeological site located on a farmstead south of Illinois Route 100 in Jersey County, Illinois, near the city of Grafton. Duncan Farm (Grafton, Illinois):  The site was part of the Hopewell exchange system in Illinois and is the closest neighboring village site to the Golden Eagle regional transaction center, a major trade and social hub in the system. Hopewell tradition:  They were connected by a common network of trade routes, known as the Hopewell exchange system.
i don't know