It was John C. Calhoun who, in 1825, first called particular attention to the southern section of the system. His attention had been turned to it by observing the numerous wide rivers, and tributaries of noble streams, which, like throbbing arteries, came forth from all sides of the North Carolina mountains, as from the chambers of a mighty heart. He saw the New river flowing towards the Ohio; the Watauga, the Nolechucky, the French Broad, the Big Pigeon, the Little Tennessee, the Hiawassee, and their thousand tributaries, pouring from the central valleys through the deep gaps of the Smokies into the western plains, and uniting with the branches from the Cumberland mountains to form the stately Tennessee; the Yadkin, the Catawba, the Broad, the Chatooga, and the headwaters of the greatest streams south of Virginia that empty into the Atlantic. From these observations he reasoned rightly that between the parallels of 35 degrees and 36 degrees and 30 minutes, north latitude, lay the highest plateau and mountains of the Atlantic coast.