values, and in the course of time any abandoned mine gets the name of having been rich; but in the case of the there is reliable evidence that the mine was abandoned through faint-heartedness, and not because it was worked out." - Horace J. Stevens, 1902, The Copper Handbook, p.196-197. Through the end of the 1800s tributers continued to pick copper out of that part of the old workings that remained above water level. Through 1888, the mine had yielded 17,352 tons (15,742 mt) of copper, as well as 533 pounds of silver. In 1899 the property was acquired by the Michigan Mining Company, which also bought the nearby Rockland and Superior mines. In 1903, the Michigan company opened the Calico amygdaloid, which held 3% copper ore, and outcropped on the Minesota property only 140 feet (43m) from the outcrop of the Minesota fissure vein. See also Copper mining in Michigan Notes References Virtual Field Trip to the Keweenaw Peninsula, Michigan - Mining History (1840-1880), Mineralogical Society of America. Mindat entry Copper mines in Michigan Silver mines in the United States Geography of Ontonagon County, Michigan Underground mines in the United States Buildings and structures in Ontonagon County, Michigan