Can anyone help with this?

Vera Milam Ryker in her book on Milams states that Dorcas Rebecca Harris Milam was full-blood Cherokee, born March 17, 1825 in Tennessee, possibly Franklin County. She married James Morrow Milam May 16, 1840 in Coffee County, Tennessee. Her indian name is reported to have been "Dark Eyes." Her father was supposedly a lesser known Eastern Cherokee chief, John Harris born about 1794. Dorcus was supposed to have registered in South Carolina (Greesburg or Greenville ?).

The Milam.com website states John Harris is listed on the 1851 Siler Roll as: John Harris #74 and on the 1852 Chapman Roll as: John Harris #41.

The above numbers in the book "Cherokee Roots" are for people that are too young to be John Harris born 1794.

I have no idea how to confirm that these people were Native Americans.

Can anyone help?

Brenda