This week's History Mystery isn't exactly a mystery, but we would love to get more information about this giant piece of history, all 5,000 pounds of it.

Cloquet resident Bill Stolberg stopped by the office in July, shortly after inviting the city of Cloquet to move the massive millstone that had been sitting in his yard for about 45 years. Stolberg believes the millstone was likely used by Northwest Paper Company to grind the pulp to get the fiber out in the early 1900s.

Stolberg fished the massive round stone out of a secret location in the St. Louis River sometime in the 1970s. There wer...