The Texas Panhandle's frontier days were fresh in memory when fiddler Eck Robertson (1887-1975) arrived. Cowboys still worked on ranches in the 1910s but barbed-wire fences abounded too. Robertson pursued a continually evolving strategy to profit from the feverish transformation of living history into marketable nostalgia. He adopted cowboy dress clothes for his first recording session in New York in 1922 and became known as a "Famous Cowboy Fiddler."...