from every vantage point within it, looking for any clue, any anomaly, anything that might let him pass into whatever it was he had just seen a hundred people pass into as if it was nothing. He had the sense of a major party taking place in the near vicinity, to which he had not been invited. In desperation he started to spin around with his arms outstretched, then decided this was completely futile and lit a cigarette instead.

He noticed that as he had pulled out the packet, a piece of paper had fluttered from his pocket, which, once the cigarette was burning well, he stooped to retrieve.

It was nothing exciting, just the bill he had picked up from the stroppy nurse in the caf. "Outrageous," he thought about each of the items in turn as he scanned down them, and was about to screw it up and throw it away when a thought struck him about the general layout of the document.

The items charged were listed down the left hand side, and the actual charges down the right.

On his own bills when he issued them, when he had a client, which was rare at the moment, and the ones he did have seemed unable to stay alive long enough to receive his bills and be outraged by them, he usually went to a little trouble about the items charged. He constructed essays, little paragraphs to describe them. He liked the client to feel that he or she was getting his or her money's worth in this respect at least.

In short, the bills he issued corresponded in layout almost exactly to the wad of papers with indecipherable runic scripts which he had been unable to make head or tail of a couple of hours previously. Was that helpful? He didn't know. If the wad was not a contract but a bill, what might it be the bill for? What services had been performed? They must certainly have been intricate services. Or at least, intricately described services. Which professions might that apply to? It was at least something to think about. He screwed up the caf bill and moved off to throw it into a bin.

As it happened, this was a fortuitous move.

It meant that he was away from the central open space of the station, and near a wall against which he could press himself inconspicuously when he suddenly heard the sound of two pairs of feet crossing the forecourt outside.

In a few seconds, they entered the main part of the station, by which time Dirk was well out of sight round the angle of a wall.

Being well out of sight worked less well for him in another respect, which was that for a while he was unable to see the owners of the feet. By the time he caught a glimpse of them, they had reached exactly the same area where a few minutes previously a small horde of people had, quietly and without fuss, vanished.

He was surprised by the red spectacles of the woman and the quietly tailred Italian suit of the man, and also the speed with which they themselves then immediately vanished.

Dirk stood speechless. The same two damn people who had been the bane of his life for the entire day (he allowed himself this slight exaggeration on the grounds of extreme provocation) had now flagrantly and deliberately disappeared in front of his eyes.

Once he was quite certain that they had absolutely definitely vanished and were not merely hiding behind each other, he ventured out once more into the mysterious space.

It was bafflingly ordinary. Ordinary tarmacadam, ordinary air, ordinary everything. And yet a quantity of people that would have kept the Bermuda triangle industry happy for an entire decade had just vanished in it within the space of five minutes.

He was deeply aggravated.

He was so deeply aggravated that he thought he would share the sense of aggravation by phoning someone up and aggravating them - as it would be almost certain to do at twenty past one in the morning.

This wasn't an entirely arbitrary thought - he was still anxious concerning the safety of the American girl, Kate Schechter, and had not been at all reassuned to have been answered by her machine when last he had called. By now she should surely be at home and in bed asleep, and would be reassuringly livid to be woken by a meddling phone call at this time.

He found a couple of coins and a working telephone and dialled her number. He got her answering machine again.

It said that she had just out for the night to Asgard. She wasn't certain which parts of Asgard they