The Origins Of Wisconsin's Kerrygold Underground

At least one Wisconsinite drives to Nebraska and back to buy Ireland's most famous non-alcoholic export: grass-fed Kerrygold butter. Fans can't buy this product in Wisconsin because a state law enacted in the 1970s.

The New York state business directory, 1870, containing the names, business and address of all merchants, manufacturers and professional men throughout the state - Library-Archives Digital Collection - Wisconsin Historical Society Online Collections

Barry Jenkins' 'Underground Railroad' Is Tough But Beautiful : NPR

Ban on Irish butter in Wisconsin sends shoppers across state lines

Wisconsin's role in the Underground Railroad

Milwaukee Oxford Research Encyclopedia of American History

Money, Page 15

Unsalted Butter

Archives, Page 63

The Land Remembers Native Histories - Edge Effects