Oliver Iron Mining Company's first location at Soudan, St. Louis County

Oliver Iron Mining Company's first location at Soudan

Oliver Iron Mining Company’s first location at Soudan, St. Louis County, 1884.

Oliver Kelley home marker, Sherburne County

Oliver Kelley home marker, Sherburne County

Oliver Kelley home marker, Sherburne County, 1937. Photographer: Everett E. Edwards.

Oliver Kelley house, restored

Oliver Kelley house, restored

Oliver Kelley house, restored, 1979.

Landscape watercolor on paper by Edwin Whitefield painted, c.1856–1859.

One mile above Shakopee looking over the valley of the Minnesota River

Landscape watercolor on paper by Edwin Whitefield painted, c.1856–1859.

Black and white photograph of open pit mining, Mesabi Range, c.1950.

Open pit mining, Mesabi Range

Open pit mining, Mesabi Range, c.1950.

Black and white photograph of he opening of the first Minneapolis skyway, connecting the Northstar Center and the Northwestern National Bank; Leslie Park is at left, 1962.

Opening of first skyway (connecting the Northstar Center and Northwestern National Bank); Leslie Park at left, Minneapolis

The opening of the first Minneapolis skyway, connecting the Northstar Center and the Northwestern National Bank; Leslie Park is at left, 1962.

Operating room, St. Mary's Hospital, Rochester

Operating room, St. Mary's Hospital, Rochester

An operating room at St. Mary's Hospital in Rochester, 1893. The Sisters of St. Francis at St. Mary's were known for their excellent nursing care.

Black and white photograph of the ore docks at Duluth, 1903.

Ore docks at Duluth

The ore docks at Duluth, 1903. These docks were originally begun by the Merritts, but the family was barely able to utilize them before losing their mining interests to John D. Rockefeller.

Oren C. Gregg, superintendent of the Farmers' Institute

Oren C. Gregg, superintendent of the Farmers' Institute

Oren C. Gregg, superintendent of the Farmers' Institute, and Lyon County auditor for ten years, c.1905. Photographer: James A. Brush.

Black and white photograph of Oren C. Gregg, c.1905.

Oren Cornelius Gregg of Lynd. Superintendent of the Farmers Institute and Lyon County Auditor for 10 years.

Oren C. Gregg, superintendent of the Farmers' Institute, and Lyon County auditor for ten years, c.1905. Photographer: James A. Brush.

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