I looked for William Tony Bunch in findagrave.com and interment.net but didn't find anything. You might want to double check the Sierra Co. cemeterties at interment.net because sometimes they had death dates but no names and one cemetery has almost no names but all inititals.
I couldn't find the Santa Nino Cemetery in Sierra Co. on-line.
You might want to check with the Sierra County Genealogical Society, rootsweb.ancestry.com/~nmscgs2/?cj=1&netid=cj&o_xi...
Some genealogical societies have records of who is buried in the cemeteries in their county. They might have info about Santa Nino Cem. Successful Searching!