Good luck with your trip!
I don't see a Elizabeth as a daughter of Benjamin. I did find one who is the daughter of Jason and Anna Richardson Morlan. She was born in 1792 in VA and died 1873 it says in Putnam Co. Ohio, maybe a typo and it's Putnam Co. In.
Check out this site when you have time.
http://www.celticgirafferesearch.com/2007.Morlan.pdfKristine