In the past I have written about Outer Banks and Ocracoke Island windmills (http://www.villagecraftsmen.com/news012113.htm). One large millstone (along with an accompanying photo) is on display in the yard of the Preservation Museum.
Not long ago a neighbor directed me to these two smaller millstones in the yard of a descendant of one of the island's 19th century millers.
Fish were often carried from Ocracoke to the mainland and traded for corn. Then the corn was ground on the island and sold in the village.
This month's Ocracoke Newsletter is a brief history of Howard's Pub. You can read it here: https://www.villagecraftsmen.com/news082117.htm.