Hugh, Here's what's listed in Booth's Records of Louisiana Confederate soldiers. I'm sorry but I don't have any other information on him. I'd suggest going to this link <http://genforum.genealogy.com/la/jackson/> and post a question about him. It's a Jackson Parish genealogy forum.

Cavanaugh, J. R., Major 9th La. ____. Federal Rolls of Prisoners of War, Captured Huntsville,
Ala., April 11th, 1862. Sent to Johnson's Island, Ohio, May 16th, 1862, from Camp Chase, Ohio.