Further, it should be noted that General Ruty, mentioned above, was the artillery commander for Nord in Belgium in 1815. A quick look at Nord's order of battle as listed in Scott Bowden's Armies at Waterloo gives the following totals:
142 6-pounders. 42 12-pounders, 14 6-inch howitzers, and 56 5.5-inch howitzers for a total of 254 pieces of ordnance.