John Blackwell died early in life , and his widow sold the mill to Augustus VanZant in 1872 .
Following the death of William Blackwell in the 1850s , his son John came into possession of the mill .
John   died early in life , and son 's widow sold the mill to Augustus VanZant in 1872 .
Following the death of William Blackwell in the 1850s , his son John came into possession of the mill .