This book, by Charles Jones, written in 1873, is extremely interesting and reveals a great deal about the culture of these tribes. There are areas that discuss conjurers, marriage and divorce, government, social relations, tools, burials and documentation of mounds.
Very interesting.
This book can be downloaded or read online for free
https://archive.org/details/antiquitiesofsou00jone
Hat tip to Yvonne.
Native Heritage Project 
Just looking on Google Earth at some of the mounds described in this book. Although they have most likely been vandalized and ransacked by archeologists over the centuries, the larger ones still remain. Thanks for sharing this. It is a good reference.