Capt. Alcide Bouanchaud's Co. A and C of the Pointe Coupee Artillery had eight pieces engaged at CH. After Pemberton gave positive orders to retreat at 4:00 Col. Withers sent four pieces of the PC Arty into Vicksburg with Stevenson and Bowen's divisions. Of the remaining four on the field one "rifled" piece (a 3 inch rifled piece) was captured on the field (by Gen. Lawler's men and taken possession of by the 8th Ill.) after this section had been moved forward to shell out the Ratliff house during the rear guard action. After this Capt. Bouanchaud reportedly had three pieces engaged in the rear guard action. I know that at least two of these were left behind after dark, spiked and the remaining rifled piece was probably also left behind. In summary, of the eight cannons engaged, one captured outright, three abandoned at night after being spiked and carriages destroyed as per artillery regulations of the time.