Complex sentence: The fort was originally known as Fort Fincastle, and was named for Viscount Fincastle, Lord Dunmore, Royal Governor of Virginia, but later renamed for Patrick Henry, and was at the time located in Virginia.
Split into simpler sentences: The fort was originally known as Fort Fincastle and was named for Viscount Fincastle, Lord Dunmore, Royal Governor of Virginia. Later it was renamed for Patrick Henry, and was at the time located in Virginia.