I dug around a bit and found that the image is from a microfilm roll, Tennessee Wills and Probate, Greene County, County Court Clerk, by Tennessee State Library and Archives Technical Services Section. It is image #58. Turns out that I didn't use it after all - it provided a date of death but the SAR application I'm reviewing (I'm SAR Chapter Registrar) references a DAR application. The latter's documentation should cover it without me adding more docs to the application and confusing the State/National reviewers. They're happy with DAR's work. It was fun looking, though!