isaac was in the 1880 ophir, ouray county census with four mining partners...thomas culbert, a.m. phelps, george f. perkins and wilson p. lane. none of the five appear in later census docs, leading me to believe they may have met their ends in colorado...or not. isaac was b.1853 in monroe county, michigan. i am uncertain what records may exist in ouray county to confirm marriage, death or business associations. sure could use some direction and assistance.