Pretty Poison raised an eyebrow. "You think this is an innocent?"

"Maybe not technically, but yes. Kill her, and you're my enemy. Forever."

Pretty Poison grinned. "Never threaten a demon, John Taylor. We have long memories." She looked at Sinner. "Besides, you wouldn't let him hurt me, would you, Sidney?"

"You're trying to confuse the issue," said Sinner. "All that matters is that you can't kill this woman now that she's helpless. It may be that she deserves it, but we are not like her. We have to be better than that. So let her go. For me."

Pretty Poison considered this for a long moment, while Bad Penny barely dared breathe, then the demon succubus abruptly dropped her victim to the ground and strolled unhurriedly back to Sinner. Bad Penny rose to her feet, brushed herself down, and gave me a smile that was only just a little shaky.

"I knew you wouldn't let her kill me, John. You always were a soppy, sentimental sort. But I will find you again. And I will kill you."

"Not on the best day you ever had," I said calmly. "I'm getting very close to my mother now, Penny. Get in the way of that, and someone will quite definitely kill you."

Bad Penny looked startled, then turned and walked quickly away, moving quite rapidly for someone in a clinging dress and high heels, and soon she was lost in the shadows at the end of the street. I watched her go and allowed myself a small smile. I couldn't kill her in cold blood, but I wasn't above putting a good scare into her. Sentiment only goes so far. And I wasn't too worried about her following us. It felt like we were getting near the end of the quest. I knew where we had to go next.

"Where are we going next?" said Madman, joining us in spirit at least. "Anywhere fun?"

"Not really," I said. "I'm pretty sure we need to go and see the Lord of Thorns."

Sinner gave me a hard look. "Correct me if I'm wrong, John, but I thought we'd agreed that was a really bad idea? I mean, ten out of ten for ambition, courage, and lateral thinking, but minus several thousand for self-preservation. The Lord of Thorns ... Possibly the oldest Being in the Nightside who still inhabits this level of reality, and the most powerful. I only mentioned him in Rats' Alley because Herne brought him up. I didn't really expect to be taken seriously."

"The Lord of Thorns," said Pretty Poison. "We know of him in Hell. They say he knew the Christ. They say angels and demons are forced to kneel in his presence."

"And if anyone should know the beginnings of the Nightside, it will be him," I said. "He was here before the Romans made Londinium into a city. And just maybe, Walker had Penny kill Herne for a reason; so he wouldn't point us in the direction of the Lord of Thorns."