COAL MINE LEDGER, BRAZIL, INDIANA RECORDS, 1869
According to the Clay County, Indiana history, it was the only one in existence around that period in Brazil although it stated that the operation ceased in either 1867 or 1868. The coal was used for the manufacturing of iron and steel and employed about 200 men. Sources: Travis, William. A history of Clay County, Indiana. Evansville, Indiana ...