"'Do you ever think about old Jonny Swiggert?' Bobby asked me. We were standing under the awning of Sam's All-Night Coffee and Donuts, sipping hot coffee from polystyrene cups. Light rain was falling and the autumn air had a winter chill...."

London cabbies must know the city, but maybe the old ones know something more. When a dark mystery pulls you like a magnet, do you follow?