Thanks David, I came across the same info at the Coryell County site and was curious.
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GSln=vandiver&GSbyrel=all&GSdyrel=all&GSst=46&GSob=n&GRid=9082993&
Family researchers indicate two of his older brothers were members of Company E, 23rd. Regiment Mississippi Infantry.
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GSln=vandiver&GSbyrel=all&GSdyrel=all&GSst=27&GSob=n&GRid=11378032&
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GSln=vandiver&GSbyrel=all&GSdyrel=all&GSst=27&GSob=n&GRid=9374523&