Figure 2.20: The relocation diffusion of Upland Southern hill folk from Appalachia to western Washington. Each dot represents the former home of an individual or family that migrated to the Upper Cowlitz River basin in the Cascade Mountains of Washington State between 1884 and 1937. Some 3000 descendants of these migrants lived in the Cowlitz area by 1940.
(After Clevinger, 1938: 120; Clevinger, 1942: 4.)