I completely understand on the death certificate. I have another ancestor I am looking for, one John Franklin Pollock. He died in 1934 in the same area of Texas. By some miracle, my wife found a scan of his death certificate online, and half of it is blank. It doesn't include the names of his parents, even though one of his sons is listed as the informant.
Life goes on, I guess. I know that someone must have some information on this man. I am going to try calling the sexton's office today, and see if the cemetery has anything.