 Two years later, the Ashby's Gap Turnpike was completed from Aldie to Middleburg, and in 1818 the Snickersville Turnpike opened, replacing the Mountain Road.By the census of 1820, Aldie had a population of 248 residents, making it the fourth largest town in the county.The population peaked in 1830 at 260—notably more than half, 132, were slaves.