Miners and a car in the pit, Soudan Mine, 1890.

Soudan Mine, 1890.

Miners at the Soudan Mine, 1890.

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

Soudan Mine, lower level, 1963.

T.B. Walker standing on the grand staircase of the Walker Art Gallery, Minneapolis, c.1925.

T.B. Walker Art Gallery, 807 Hennepin Avenue, Minneapolis, c.1890.

Portrait miniature of T.B. Walker, c.1920. Artist: W. Patterson.

Hennepin Island Hydro Plant, designed by William de la Barre, January 22, 1908.

Lower Dam and Lower Dam Hydro Plant, St. Anthony Falls, designed by William de la Barre, c.1898.