Both batteries used British pieces, I assume 6 pounders based on what I could glean from the readings.
The field battery is shown here , I model artillery units in two gun model sections to a battery. This works well in the Piquet rule sets I tend to play in, the Army level 'Field of Battle' and the more tactical 'Les Grognards.' Once again, the penchant for black uniforms is shown in both units.
Now for the casualty and officer figures. The Duke of Brunswick pack was a long time in coming. Before the Perry's website had a shopping cart and the Warstore started carrying the line of figures, the US source for the figures was 'Age of Glory.' The owner of the Age of Glory was by agreement with the Perry's, only to sell at conventions, not mail order. So over three Historicons and a local convention here in CT I requested and found to be out of stock, this one pack. When I did finally obtain the pack, the owner dryly said 'I don't think I can sell you this pack.' He did, and so here they are. By the way, he no longer carries the Perry line, but does carry the Empress Figures line now. You may see some of the Spanish Civil War (1930's version) figures he carries from that manufacturer here in the future.
Coming up last but certainly not least, the cavalry units!