Much of Spotsylvania County's early development is attributed to Spotswood's ironworks which was founded in the early 1700's. His Iron Mines Company, a mining and smelting operation, was founded in 1725 at Germanna. This was the first fully equipped iron furnace in the colonies and Spotsylvania County's first industry...In the wilderness of Spotsylvania County, Spotswood left behind a nearly self-sufficient iron empire that set in motion the rise of America's iron and steel industry.
Source - http://www.spotsylvania.org/ff2.htm
Culpepper, Stafford, Caroline, Hanover, Louisa and Orange counties as well as the Independent City of Fredericksburg.