The Fort at Number 4 was the northernmost British settlement along the Connecticut River in New Hampshire until after the French and Indian War. Now known as Charlestown, it was more than from the nearest other British settlement at Fort Dummer. Construction began in 1740 by brothers Stephen, Samuel and David Farnsworth. By 1743, there were 10 families settled in a square of interconnected houses, enclosed in a stockade with a guard tower.