From Minneapolis Park History:
Hall's Island in 1903 plat book (John R. Borchert Map Library, University of Minnesota)
Before he saved enough money to go to medical school, Pearl Hall’s job as a teenager in the mid-1870s was pitching wood onto a cart at a lumber yard near the Plymouth Avenue Bridge on the east bank of the Mississippi River. He remembered vividly from those days of hard labor what he called a little steeple of land sticking out of the Mississippi near the bridge. He could see the tiny patch of ground when he stood on top of his loaded wagon–and he saw the little steeple gradually grow.