I have seen Clarissa's last name variously as Harding, Hardin and Harden. For this Wiki, I am going with Harding primarily because the family tree of her father Miller goes clear back to Massachusetts in the 1600s, and they are all Hardings, with the exception of a few family trees that list Miller and Clarissa as Harden. With regional dialects being what they are, I can easily see where the training "g" might get dropped orally, causing it to be documented as Hardin or Harden.
Here is an example of one listing it as Harding:
JCharlesW 18:20, 18 September 2010 (MST)
OK, based on the text of Clarissa's autobiography I have changed it to Harden. If Wilhelm can get changed to Williams and back to Wilhelm again within a few generations, then I guess Harding can become Harden. Since she refers to both herself and her father and grandparents as all being Harden, that's what the wiki will use.
JCharlesW 12:24, 21 September 2010 (MST)