Above all it is the city’s relationship with its past which continues to intrigue me: of the great cities of the world, only Rome, Istanbul and Cairo can even begin to rival Delhi for the sheer volume and density of historic remains. Crumbling tomb towers, old mosques or ancient colleges intrude in the most unlikely places, appearing suddenly on roundabouts or in municipal gardens, diverting the road network and obscuring the fairways of the golf course. New Delhi is not new at all; instead it is a groaning necropolis, with enough ruins to keep any historian busy through several incarnations.