Christena's stone is in a farm field in Lutheran cemetery Parke County, Indiana the email of a photocopy of a picture of the stone shows it as broken in half. (John Trent sent me the email) I was unable to make connections with the owner of the farm while I was in Parke County although I have since written him to ask about the cemetery.
The stone seems to read ( the image is very hard to read)
July 31, 1858
65 ys 8ms ?ds
The transcription on Carol Ealey's site is (she has not verified this cemetery but went from the transcript in Parke County.)
SAPPENFIELD Christena 64y-8m-5d 07-31-1858 w/o Mathis
Calculated birth date would be 11-26-1792 or 1793
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Data compiled, maintained, and hosted by Jay Hannah <jay(at)jays(dot)net>. http://jays.net/genealogy/