of waiters.

"What do you want a knife for, anyway?" asked Sally.

"To open this," said Dirk, waggling the large, heavily Sellotaped envelope at her.

"I'll get you one," she said. A young man sitting on his own at another nearby table was looking away at that moment, so Sally quickly leaned across and nabbed his knife.

"I am indebted to you," said Dirk and put out his hand to take the knife from her.

She held it away from him.

"What's in the envelope?" she said.

"You are an extremely inquisitive and presumptuous young lady," exclaimed Dirk.

"And you," said Sally Mills, "are very strange."

"Only," said Dirk, "as strange as I need to be."

"Humph," said Sally. "What's in the envelope?" She still wouldn't give him the knife.

"The envelope is not yours," proclaimed Dirk, "and its contents are not your concern."

"It looks very interesting though. What's in it?"

"Well, I won't know till I've opened it!"

She looked at him suspiciously, then snatched the envelope from him.

"I insist that you - " expostulated Dirk, incompletely.

"What's your name?" demanded Sally.

"My name is Gently. Mr Dirk Gently."

"And not Geoffrey Anstey, or any of these other names that have been crossed out?" She frowned, briefly, looking at them.

"No," said Dirk. "Certainly not."

"So you mean the envelope is not yours either?"

"I - that is - "

"Aha! So you are also being extremely... what was it?"

"Inquisitive and presumptuous. I do not deny it. But I am a private detective. I am paid to be inquisitive and presumptuous. Not as often or copiously as I would wish, but I am nevertheless inquisitive and presumptuous on a professional basis."

"How sad. I think it's much more fun being inquisitive and presumptuous as a hobby. So you are a professional while I am merely an amateur of Olympic standard. You don't look like a private detective."

"No private detective looks like a private detective. That's one of the first rules of private detection."

"But if no private detective looks like a private detective, how does a private detective know what it is he's supposed not to look like? Seems to me there's a problem there."

"Yes, but it's not one that keeps me awake at nights," said Dirk in exasperation. "Anyway, I am not as other private detectives. My methods are holistic and, in a very proper sense of the word, chaotic. I operate by investigating the fundamental interconnectedness of all things."

Sally Mills merely blinked at him.

"Every particle in the universe," continued Dirk, warming to his subject and beginning to stare a bit, "affects every other particle, however faintly or obliquely. Everything interconnects with everything. The beating of a butterfly's wings in China can affect the course of an Atlantic hurricane. If I could interrogate this table-leg in a way that made sense to me, or to the table-leg, then it could provide me with the answer to any question about the universe. I could ask anybody I liked, chosen entirely by chance, any random question I cared to think of, and their answer, or lack of it, would in some way bear upon the problem to which I am seeking a solution. It is only a question of knowing how to interpret it. Even you, whom I have met entirely by chance, probably know things that are vital to my investigation, if only I knew what to ask you, which I don't, and if only I could be bothered to, which I can't."

He paused, and said, "Please will you let me have the envelope and the knife?"

"You make it sound as if someone's life depends on it."

Dirk dropped his eyes for a moment.

"I rather think somebody's life did depend on it," he said. He said it in such a way that a cloud seemed to pass briefly over them.

Sally Mills relented and passed the envelope and the knife over to Dirk. A spark seemed to go out of her.