Also -- follow the coal mines. I don't know if there were mines in Sumner County, Kansas, but there were East of there, around Pittsburg. I learned about the mines in Macoupin by following family to Virden from Will, Grundy, Livingston counties in Illinois. The migrations not only followed the railroads but also to where the jobs were. If you're looking for missing family who may have worked the mines, you might check Montana. I did. Holms S. (Hal) Young Cotton Family Researcher