Hi Brett,
In reference to Maurin's Battery, the Donaldsonville Artillery, the University of Louisiana at Lafayette Press (ULPress.org) recently published Gallant Creoles, A History of the Donaldsonville Artillery that has the complete story and information, including diary accounts of the Canonniers nine month participation with the ANV Third Corps in the Siege of Petersburg. You may also want to check out a November 2013 online book review of Gallant Creoles at Civil War News, a monthly newspaper. Thanks for your interest.
Michael Marshall