kemp/brown

I am trying to locate anything on Margaret J Kemp.Her birth was about 1849 in Missouri I think.She married William Samuel Brown in about 1865 in Missouri.She died on 6 Nov 1875 and is buried in the Walker/Wright Cem. in Cross Timbers, Mo.The death is the only "for sure fact". Anything else would be so appreciated.
Her children are: Zilpha P; Martha; John H; Columbus; & Sarah J.