I just stumbled upon this looking for Rock Hill myself, off a death certificate, stating Knox County I can't find in engine searches, or Find A grave. Were you able to finally locate where it is located and what the possible name of it now?

I did not know you could apply for the application of a deceased ancestor, this could shed some light on a few relatives I have- From the Social Security Administration site, how does one go about applying for the application, is it expensive, and do they have to be deceased by a certain year? Thank you in advance.