Black and white photograph of Dr. Thomas R. Potts, c.1855. Potts was the assistant surgeon and medical purveyor at Fort Snelling during the Civil War.

Dr. Thomas R. Potts

Dr. Thomas R. Potts, c.1855. Potts was the assistant surgeon and medical purveyor at Fort Snelling during the Civil War.

Black and white photograph of Dr. Valdo Turner in his office, c.1915.

Dr. Valdo Turner

Dr. Valdo Turner in his office, ca.1915. Turner was vice president of the St. Paul NAACP and captain of the Sixteenth Battalion Medical Corps, Minnesota Home Guard.

Dr. William J. Mayo

Dr. William J. Mayo

Dr. William J. Mayo, c.1933.

Dr. William J. Mayo and Dr. Charles H. Mayo with President Franklin Roosevelt

Dr. William J. Mayo and Dr. Charles H. Mayo with President Franklin Roosevelt

Dr. William J. Mayo and Dr. Charles H. Mayo with President Franklin Roosevelt, Rochester, 1934.

Dr. William W. Mayo

Dr. William W. Mayo

Dr. William W. Mayo, c.1900.

Black and white drawing of Abigail Hunt Snelling, c.1875.

Drawing of Abigail Hunt Snelling

Black and white drawing of Abigail Hunt Snelling, c.1875.

Pastel drawing on paper of Adolf Dehn made by Wanda Gág, c.1915.

Drawing of Adolf Dehn

Pastel drawing on paper of Adolf Dehn made by Wanda Gág, c.1915.

Fort Ripley, 1862. Pen and wash drawing made in 1864 by Corporal August Harfeldt, Third Battery, Minnesota Light Artillery.

Drawing of Fort Ripley

Fort Ripley, 1862. Pen and wash drawing made in 1864 by Corporal August Harfeldt, Third Battery, Minnesota Light Artillery.

Fort Ripley view from the north, 1864. Pen and wash drawing by Corporal August Harfeldt, Third Battery, Minnesota Light Artillery.

Drawing of Fort Ripley from the north

Fort Ripley view from the north, 1864. Pen and wash drawing by Corporal August Harfeldt, Third Battery, Minnesota Light Artillery.

Architectural drawing of the Minnesota Building, c.1928.

Drawing of Minnesota Building

Architectural drawing of the Minnesota Building, c.1928.

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