Royal Artillery casualties in the War of 1812

Back in 2012, a Canadian schoolteacher created a "War of 1812 casualties" project, focused on the Crown Forces engaged against the French. The idea was to obtain relevant copies of the WO 25 series of casualty reports, and to transcribe this. This can now be accessed via FindMyPast. In 2016, Ancestry digitised the WO 12 series of muster and pay lists for the years 1812 to 1817. There has been some debate as to just how many British died at New Orleans. For anyone with a doctoral grant wishing to follow this up, the latter two sources will be able to provide the ability to assess casualties for a given infantry battalion, or for all the infantry battalions present at New Orleans or similar. For the artillery, it is a bit different. They were not administered by the War Office until 1855. When this happened, it looked like a deliberate plan came into being, whereby the legacy records were mixed up, rather than being catalogued and being put into a coherent order. (There's a reason for mentioning this, which will be explained later.) To get back on topic: There were three companies of Royal Artillery that took part in the Chesapeake campaign of 1814. Michell's company of the 9th Battalion, with Pym's company and Carmichael's company of the 8th Battalion. Major General Keane left Plymouth for North America on 18 September 1814. He was accompanied by the 93rd Foot, five companies of the 95th Foot, a dismounted squadron from the 14th Light Dragoons, and extra artillery. This took the form of 40 men in a rocket detachment commanded by Captain Lane, and Major Munro's company of the 9th Battalion Royal Artillery. That I can tell, when Keane's convoy stopped at Madeira, detachments of gunners arrived from Lisbon. Carmichael and Michell were to have 15 and 25 gunners respectively, Pym had only 2! Although under the command of these men, they were still associated with their parent artillery company.