Thank you AOG. I know a fair bit about the battle, but this is a fascinating article and well worth reading.
For anyone interested (and who can get there) there is a museum on the Halifax/Queensbury road on the outskirts of Halifax, which has a plethora of 'Wellingtonia' - his campaign bed, uniform etc.. It is very well worth a visit. (It used to be free entry, but I've not been for a while.) This is because the 'Duke o' Boots' regiment was based at Halifax. The Barracks is now a school site.