Ron Coddington:
Other than standard sources: Booth, Evans CSA history,AW Bergeron, you might try Ellsworth Eliot, Yale in the Civil War. He has info on WPR.
If you come across Avan E. Read (1842-1902), Wheat's Bn., who lived in Baton Rouge, or Lt. Col. William Mouton (both Yalies), I would appreciate hearing.
Nat Hughes
Chattanooga