From Booth's La. records:

Dupuy, Joachim, Pvt. Co. I, 1st La. Hvy. Arty. (Regulars). Roll for Sept. and Oct., 1862, Present, Conscript, joined Co., Oct. 20, 1862. Regtl. Return for Dec., 1862, Died at Vicksburg, Miss., Dec. 6, 1862, of disease.