That's if you believe the official maps. In practice, the Nightside is much bigger than that, as though space itself has reluctantly expanded to fit in all the darkness and evil and generally strange stuff that has set up home there. There are those who say the Nightside is actually bigger than the city that surrounds it, these days. Which says something very disturbing about human nature and appetites, if you think about it. Not to mention inhuman appetites. The Nightside has always been a cosmopolitan kind of place.

"It's always night in the Nightside. It's always three o'clock in the morning, and the dawn never comes. People are always coming and going, drawn by needs that dare not speak their names, searching for pleasures and services unforgivable in the sane, daylight world. You can buy or sell anything in the Nightside, and no-one asks questions. No-one cares. There's a nightclub, where you can pay to see a fallen

angel forever burning inside a pentacle drawn in baby's blood. Or a decapitated goat's head, that can tell the future in enigmatic verses of perfect iambic pentameter. There's a room where silence is caged, and colours are forbidden, and another where a dead nun will show you her stigmata, for the right price. She didn't rise again, after all, but she'll still let you stick your fingers in the blood-caked holes, if you want.

"Everything you ever feared or dreamed of is running loose somewhere in the shifting streets of the Nightside, or waiting patiently for you in the expensive private rooms of patrons-only clubs. You can find anything in the Nightside, if it doesn't find you first. It's a sick, magical, dangerous place. You still want to go there?"

"You're lecturing me again."

"Answer the question."

"How could such a place exist, right here in the heart of London, without everyone knowing?"

"It exists because it has always existed, and it stays a secret because the powers that be, the real powers, want it that way. You could die there. I could die there, and I know my way around. Or at least, I did. I haven't been back in years. Still want to do this?"