The Miller Application numbers are totally different than a regular roll number, which contains an index of names that may lead to a person's family tribal enrollment card through that number. The enrollment card also has vital information such as name, family relations, age, sex, blood quantum, etc. But the Miller Applications can lead you to generations of family information and history along with, in many cases, testimony not just from family but neighbors, tribal members and acquaintances. The books not only can lead you to Cherokee blood as a descendant of an Emigrant Cherokee but also to thousands of other Cherokee bloodlines as well as possibly relations to other tribes during testimony. So these materials are a researcher's dream come true.