I am trying to find information on my grandmother's brothers and the stores they owned in Wise, Tazewell, Washington Counties in Virginia. They also had stores in Sullivan and Knox counties in Tennessee, Oklahoma, Florida and Kentucky. They were born in Hancock County, Tennessee in the last quarter of the 1800s and were George F., William D., Henry, James C., Hiram, John and Irwin M. Fuller. They were influential in the development of Kingsport, Tennessee. Any information would be appreciated.