Ms. Mary,
You can obtain a copy of Dr. Bergeron's MIles' Legion: A History & Roster from a store called "Little Wars" in Baton Rouge. They have a handfull of copies left so I really recommend getting a copy soon. Here is their contact information...
Little Wars Inc.
7517 Jefferson Highway
Baton Rouge, LA 70806-8308
Phone: (225) 924-6304
Fax: (225) 926-4556
Toll Free: (800) 898-8184
Email: manager@littlewars.com