You are welcome! You might write a letter to the Fluvanna County courthouse and ask them if they have a record of this death. It may be that she died a bit later than you think, outside the scope of the records in the book. I have found the courthouse to be most helpful in sending me records in the past.
I did use a researcher from Palmyra who helped me tremendously gathering records necessary for acceptance into the DAR. Use the "contact me" feature if you would like more information on how to get in touch with this researcher.
Good luck finding what you need!
Lynne Haislip Hill