The Greene County Genweb site at www.rootsweb.com/~argreene/ has a great cemetery resource, with surname search, index to cemeteries, etc.

I've yet to find any of the Clay County cemeteries online, but my library has a book with listings. It's a tad out-of-date and I've found some strange errors, but it's better than nothing, right? I will look for Charles Pening Bryant in the book and see if I can find out anything. Do you think Sarah Purvis was buried in Greene or Clay?