TO SET THE RECORD STRAIGHT... THIS ORIG LINES OF THE SOUNG COMES FROM AN OLD RAILROAD SONG. WHEN THE CNW AND Western Carolina railroad has a rail line from Salisbury to Paint Rock and Henry ..in the Mountains. that was the end of the trackage at the time, SO the owers of the railroad had a stagecoach, driven by Jack Pence, who handled the ribbons (the Reins) of SIX WHITE HORSES, and drove the stage across the Mountains, to Ashville., during the night, without ever an accident or loss of life. thus, 'she'll be coming round the mountain.
so there you have it... it was written and put into song.