John R. Foster in collaboration with Glen C. Morton.
A decade before the turn of the century, experiments in South Africa's Transvaal proved that a process involving deadly potassium cyanide could be used to extract gold from low grade ore. A somewhat improbable locale, Fergus County in Central Montana, became one recipient of the radical new technique, creating a
fresh bonanza long after rich placer strikes of the 1880's had petered out. ln 1892, the first experimental cyanide mill was built in the Judith Mountains, and
its success soon revitalized Central Montana gold production, bringing in a fresh flood of excited goldseekers and creating a booming town named Kendall.