"The dead man smelled like fish. Rotting fish. Pale, bloodless, and faceless, he lay on the stained granite slab in the center of Paul Gibson's ancient stone outbuilding, filling the small room with a foul stench. But then, bodies pulled from the Thames did have a nasty tendency to reek of fish. Fish, brine, tar, and-if it was warm and they'd been in the water long enough-decay. The outbuilding stood at the base of a newly planted garden that stretched...