 A ground electromagnetic survey was conducted in Oct 1963 and a drill rig started drilling a 600-foot core sample in Nov.The core, later confirmed by the Union Assay Office in Salt Lake City, showed an average copper content of 1.15%, an average zinc content of 8.64%, and 3.94 ounces of silver per ton.A second hole was drilled in March 1964, followed by two more in early April.