'If a man is likely to be murdered you can't just stand by and do nothing. Or can you?' Inglewood Turrets, an expensive anachronism in the leafy outskirts of North London is a cross between St Pancreas Station and Holloway Gaol, and the house where the formidable Miss Charlotte Cambric recreates Victorian elegance for foreign culture-vultures. Vassily Kopeck, the half-Russian, half-Polish physicist and an 'attaché of sorts', disappears as effectively...