Irish turnip Jack-o’-lantern, Early 20th Century, on display in the Museum of Country Life, Ireland

In the 19th century, Halloween guisers (children in disguise) in parts of Ireland and the Scottish Highlands commonly used jack-o’-lanterns made from turnips and mangelwurzels. They were often carved withgrotesque faces to represent spirits or goblins and were literally used as lanterns to guide guisers on All Hallows’ Eve.