Re: Robert Wesley Hicks & Nancy Jane Williams - Marion Co,
In case you don't already have all this info, the Chattanooga Public Library's Local History and Genealogy Department has a wealth of resources that might help you:
Tennessee Death Certificates from 1908-1961 (no 1913; 1962 expected any day).Even earlier ones for Chattanooga and Hamilton County.
Civil War service records complete for Tennessee, Alabama, Georgia (both Union and Confederate).Tennessee pension records (Confederate only - soldiers and widows).
Obituaries for Chattanooga, Hamilton County, and some of the surrounding areas.
Chattanooga City Directories from the 1880's through 2008.
Cemetery surveys for the area.
Lots of other stuff.