Barbara,
There is a really great web site for cemetery records, will list the exact one for Overbrook, Ks. found Cyrus Beard listed there. It is a long one:
www.interment.net/data/us/ks/osage/overbrook_ah.htm
Lists lots of cities, states and several countries. This web site as given stands for United States, Kansas, Osage County, Overbrook, letters a-h.
Good Luck

Anita