Mayhew, Mays, McClelland and Mills all lived and died in the Robert E Lee Camp Soldier's Home. Their names appear in those records as listed in my response here and all are interred in Hollywood. Have you looked at the applications to the home? It will provide you detailed information as will their individual pension applications (or that of their surviving spouse).
Re: Mayhew--he could not read or write and his CSR says Mayhew---the family says Mayhugh.