I have done much research on letty. I have contacted Native researcher's about her. They have known about her for year's. Researcher's do beleave her to be full blood cherokee,because of the time she lived and also where she lived.They have told me that she got the Durham name from an english missionary who came to help the Cherokee's.
there is a book called the FOOTSTEPS OF THE CHEROKEE.
In that book there is a story about the friendship between Thomas Howard and Shyuica a Cherokee and how they fought the REV WAR together. There are Durhams on the DAWES roll. I hear their are Durham's on the Reservations too.I have heard that Riley Howard sent in an application for Cherokee recognition.If any one finds this please let me know.
There seems to a lot family trying to prove letty's heritage. Don't Give up!