I've spent the past forty-two hours with an emissary from the Mother Country, and for the past forty hours - since a quick puff after dinner on Friday night - the emissary has been eschewing the demon cheroot. This may have been my fault. I think I said something off-hand about carotid arteries. But, I swear, apart from peering schoolmarmishly over my clean-living spectacles, that was all. By lunchtime today, I was offering her a dusting of snuff with her iced chocolate.