I am descended from the Clay County Robertsons as well. Columbus and Malinda are my ggg grandparents. My aunt has copies of documents signed by Columbus. His name was Silas Columbus Robertson. This may answer your question regarding the name Silas. We have no information on Malinda/Linda Reid, and would appreciate any that you may have. I would be glad to share any and all information that we have. We traveled to Clay County this past summer looking for the David Robertson Cemetery, but we could not find it. I look forward to hearing from you.