'OK,' he said. He watched me go down the stairs and shrugged as he shut his door.

I went into the hall, picked up the phone and dialled.

'Hello, Tom?' Tom Farnold works the desk next to mine at the office. 'Tom, Harry here. What time do you make it?'

'Time the liberals were back.'

'No, seriously.'

'Let's see. Twelve past nine. By the way, did you find those pickles I left for you in the safe?'

'Yeah, thanks. Listen, Tom,' I went on, 'the goddamdest things are happening here. We were watching Diller's play on Channel 2 when , 'I'm watching it now. Hurry it up.'

'You are? Well, how do you explain this repetition business? And the way the clocks are stuck between 9 and 9.15?'

Tom laughed. 'I don't know,' he said. 'I suggest you go outside and give the house a shake.'

I reached out for the glass I had with me on the hall table, wondering how to explain to The next moment I found myself back on the sofa. I was holding the newspaper and looking at 17 down. A part of my mind was thinking about antique clocks.

I pulled myself out of it and glanced across at Helen. She was sitting quietly with her needle basket. The all too familiar play was repeating itself and by the clock on the mantelpiece it was still just after 9.

I went back into the hail and dialled Tom again, trying not to stampede myself. In some way, I hadn't begun to understand how, a section of time was spinning round in a circle, with myself in the centre.

'Tom,' I asked quickly as soon as he picked up the phone. 'Did I call you five minutes ago?'

'Who's that again?'

'Harry here. Harry Bartley. Sorry, Tom.' I paused and rephrased the question, trying to make it sound intelligible. 'Tom, did you phone me up about five minutes ago? We've had a little trouble with the line here.'

'No,' he told me. 'Wasn't me. By the way, did you get those pickles I left in the safe?'

'Thanks a lot,' I said, beginning to panic. 'Are you watching the play, Tom?'

'Yes. I think I'll get back to it. See you.'

I went into the kitchen and had a long close look at myself in the mirror. A crack across it dropped one side of my face three inches below the other, but apart from that I couldn't see anything that added up to a psychosis. My eyes seemed steady, pulse was in the low seventies, no tics or clammy traumatic sweat. Everything around me seemed much too solid and authentic for a dream.

I waited for a minute and then went back to the lounge and sat down. Helen was watching the play.

I leant forward and turned the knob round. The picture dimmed and swayed off.

'Harry, I'm watching that! Don't switch it off.'

I went over to her. 'Poppet,' I said, holding my voice together. 'Listen to me, please. Very carefully. It's important.'

She frowned, put her sewing down and took my hands.

'For some reason, I don't know why, we seem to be in a sort of circular time trap, just going round and round. You're not aware of it, and I can't find anyone else who is either.'

Helen stared at me in amazement. 'Harry,' she started, 'what are you '

'Helen!' I insisted, gripping her shoulders. 'Listen! For the last two hours a section of time about 15 minutes long has been repeating itself. The clocks are stuck between 9 and 9.15. That play you're watching has '

'Harry, darling.' She looked at me and smiled helplessly. 'You are silly. Now turn it on again.'

I gave up.

As I switched the set on I ran through all the other channels just to see if anything had changed.

The panel stared at their pot, the fat woman won her sports car, the old farmer ranted. On Channel 1, the old BBC service which put out a couple of hours on alternate evenings, two newspaper men were interviewing a scientific pundit who appeared on popular educational programmes.

'What effect these dense eruptions of gas will have so far it's impossible to tell. However, there's certainly no cause for any alarm. These billows have mass, and I think we can expect a lot of strange optical effects as the light leaving the sun is deflected by them gravitationally.'

He started playing with a set of coloured celluloid balls running on concentric metal rings, and fiddled with a ripple tank mounted against a mirror on the table.

One of the newsmen asked: 'What about the relationship between light and time? If I remember my relativity they're tied up together pretty closely. Are you sure we won't all need to add another hand to our clocks and watches?'

The pundit smiled. 'I think we'll be able to get along without that. Time is extremely complicated, but I can assure you the clocks won't suddenly start running backwards or sideways.'

I listened to him until Helen began to remonstrate. I switched the play on for her and went off into the hall. The fool didn't know what he was talking about. What I couldn't understand was why I was the only person who realized what was going on. If I could get Tom over I might just be able to convince him.

I picked up the phone and glanced at my watch.

9.13.

By the time I got through to Tom the next changeover would be due. Somehow I didn't like the idea of being picked up and flung to the sofa, however painless it might be. I put the phone down and went into the lounge.

The jumpback was smoother than I expected. I wasn't conscious of anything, not even the slightest tremor. A phrase was stuck in my mind: Olden Times.

The newspaper was back on my lap, folded around the crossword. I looked through the clues.

17 down: Told by antique clocks? 5, 5.

I must have solved it subconsciously.

I remembered that I'd intended to phone Tom.

'Hullo, Tom?' I asked when I got through. 'Harry here.'

'Did you get those pickles I left in the safe?'

'Yes, thanks a lot. Tom, could you come round tonight? Sorry to ask you this late, but it's fairly urgent.'

'Yes, of course,' he said. 'What's the trouble?'

'I'll tell you when you get here. As soon as you can?'

'Sure. I'll leave right away. Is Helen all right?'

'Yes, she's fine. Thanks again.'

I went into the dining room and pulled a bottle of gin and a couple of tonics out of the sideboard. He'd need a drink when he heard what I had to say.

Then I realized he'd never make it. From Earls Court it would take him at least half an hour to reach us at Maida Vale and he'd probably get no further than Marble Arch.

I filled my glass out of the virtually bottomless bottle of scotch and tried to work out a plan of action.

The first step was to get hold of someone like myself who retained his awareness of the past switchbacks. Somewhere else there must be others trapped in their little 15minute cages who were also wondering desperately how to get out. I could start by phoning everyone I knew and then going on at random through the phonebook. But what could we do if we did find each other? In fact there was nothing to do except sit tight and wait for it all to wear off. At least I knew I wasn't looping my loop. Once these billows or whatever they were had burnt themselves out we'd be able to get off the roundabout.

Until then I had an unlimited supply of whisky waiting for me in the halfempty bottle standing on the sink, though of course there was one snag: I'd never be able to get drunk.

I was musing round some of the other possibilities available and wondering how to get a permanent record of what was going on when an idea hit me.

I got out the phonedirectory and looked up the number of KBCTV, Channel 9.

A girl at reception answered the phone. After haggling with her for a couple of minutes I persuaded her to put me through to one of the producers.

'Hullo,' I said. 'Is the jackpot question in tonight's programme known to any members of the studio audience?'

'No, of course not.'

'I see. As a matter of interest, do you yourself know it?'

'No,' he said. 'All the questions tonight are known only to our senior programme producer and M. Phillipe Soisson of Savoy Hotels Limited. They're a closely guarded secret.'

'Thanks,' I said. 'If you've got a piece of paper handy I'll give you the jackpot question. "List the complete menu at the Guildhall Coronation Banquet in July 1953."

There were muttered consultations, and a second voice came through.

'Who's that speaking?'

'Mr H.R. Bartley, 129b Sutton Court Road, N.W. '

Before I could finish I found myself back in the lounge.

The jumpback had caught me. But instead of being stretched out on the sofa I was standing up, leaning on one elbow against the mantelpiece, looking down at the newspaper.

My eyes were focused clearly on the crossword puzzle, and before I pulled them away and started thinking over my call to the studio I noticed something that nearly dropped me into the grate.

17 down had been filled in.

I picked up the paper and showed it to Helen.

'Did you do this clue? 17 down?'

'No,' she said. 'I never even look at the crossword.'

The clock on the mantelpiece caught my eye, and I forgot about the studio and playing tricks with other people's time.

9.03.

The merrygoround was closing in. I thought the jumpback had come sooner than I expected. At least two minutes earlier, somewhere around 9.13.

And not only was the repetition interval getting shorter, but as the arc edged inwards on itself it was uncovering the real time stream running below it, the stream in which the other I, unknown to myself here, had solved the clue, stood up, walked over to the mantelpiece and filled in 17 down.

I sat down on the sofa, watching the clock carefully.

For the first time that evening Helen was thumbing over the pages of a magazine. The work basket was tucked away on the bottom shelf of the bookcase.

'Do you want this on any longer?' she asked me. 'It's not very good.'

I turned to the panel game. The three professors and the chorus girl were still playing around with their pot.

On Channel 1 the pundit was sitting at the table with his models.

'... alarm. The billows have mass, and I think we can expect a lot of strange optical effects as the light , I switched it off.

The next jumpback came at 9.11. Somewhere I'd left the mantelpiece, gone back to the sofa and lit a cigarette.

It was 9.04. Helen had opened the verandah windows and was looking out into the street.

The set was on again so I pulled the plug out at the main. I threw the cigarette into the fire; not having seen myself light it, made it taste like someone else's.

'Harry, like to go out for a stroll?' Helen suggested. 'It'll be rather nice in the park.'

Each successive jumpback gave us a new departure point. If now I bundled her outside and got her down to the end of the road, at the next jump we'd both be back in the lounge again, but probably have decided to drive to the pub instead.

'Harry?'

'What, sorry?'

'Are you asleep, angel? Like to go for a walk? It'll wake you up.'

'All right,' I said. 'Go and get your coat.'

'Will you be warm enough like that?'

She went off into the bedroom.

I walked round the lounge and convinced myself that I was awake. The shadows, the solid feel of the chairs, the definition was much too fine for a dream.

It was 9.08. Normally Helen would take ten minutes to put on her coat.

The jumpback came almost immediately.

It was 9.06.