APPROXIMATELY LOCATED IN OR AROUND THE LEVIATHAN MINING DISTRICT ; COPPER; SULPHUR; LEVIATHAN SULPHUR MINE; COPY FROM: CALIFORNIA STATE DIVISION OF MINES; MINERAL INFORMATION SERVICE; VOL. VI; NO. 12; 1 DECEMBER 1953; PAGE 6; LEVIATHAN MINE (SEVEN MILES EAST OF MARKLEEVILLE; CALIFORNIA); IN ALPINE COUNTY CALIF