Note: According to the census report in June 1880, Minerva was 77 years old and head of a farming household which included her daughter Catharine 22 years, son Averill 18, and grandson Alva R. Fellure, one year old. Alva was the son of Minerva's daughter Arizona, who had died in February of that year.
If Minerva was 77 years old in 1880, then she was born about 1803. Perhaps the first 7 should have been a 5.