I don't know how this could be done at this time. Sometimes where a person was buried appears on the death certificate or in the obituary.
I don't know how far back their death records go, but the McLennan County Clerk, www.co.mclennan.tx.us/cclerk/index.aspx
The Central Texas Genealogical Society, www.ctgs.org/
MIGHT have obituaries that old. They might also have other burial info. Successful Searching!