If you would like, I can send you photos of their graves from the Hart Cemetert at Rio Vista, and other information I have. The Tridel you list, I believe, is actually my husbands, g-g-great grandfather, Iredell. His name was misread in other information I have; it has also been spelled Isidell. However, if he is the same man, he is the son of Richard Meredith Hart. (My father-in-law and his grandfather were also named Iredell.) I will look at my paperwork and get back to you about the Clements in the family. I have also realized the photo I was looking at previously is not the same as the one on the link I listed; there are too many differences in the building. I would still like to identify this very large photo. Someone has marked two stars near two men in the photo. I look forward to sharing information with you.