Oliver T. McElrath of South Carolina

i am trying find out information on oliver t. mcelrath, who is buried at rosehill cemetery in piedmont south carolina. he was born june 23, 1852 and died august 18, 1925. he marrried a Mary E. Nimmons on august 28, 1870. i believe i have her last name correct. they had four children. any help would be appreciated. the most important information i am trying to find is his parents and anything on the four children. thanks brian