It was absurd. No questions; he knew it was absurd. Spies of Harting's calibre do not steal; they record, memorise, photograph; spies of Harting's calibre act by graft and calculation, not by impulse. They cover their tracks and survive to deceive again tomorrow.

Nor do they tell transparent lies.

They do not tell Jenny Pargiter that choir practice takes place on Thursdays when she can find out within five minutes that they take place on Fridays. They do not tell Meadowes that they are attending conferences in Bad Godesberg, when both Bradfield and de Lisle know that they are not; and have not done so for two years or more. They do not draw their balance of pay and allowances before they defect, as a signal to anyone who happens to be interested; they do not risk the curiosity of Gaunt in order to work late at night.

Work where ?

He wanted privacy. He wanted to do by night things he could not do by day. What things? Use his camera in some remote room where he had concealed the files, where he could turn the lock upon himself? Where was the trolley? Where was the typewriter? Or was their disappearance, as Meadowes had assumed, really unconnected with Harting? At present there was only one answer: Harting had hidden the files in a cache during the day, he had photographed them at night in privacy, and he returned them the next morning... Except that he hadn't returned them. So why steal?

A spy does not steal. Rule one. An Embassy, discovering a loss, can change its plans, re-make or revoke treaties, take a dozen prophylactic measures to anticipate and minimise the harm that has been done. The best girl is the girl you don't have. The most effective deceit is the deceit which is never discovered. Then why steal? The reason was already clear. Harting was under pressure. Calculated though his actions might be, they had all the marks of a man racing against time. What was the hurry? What was the deadline?

Slowly, Alan; gently, Alan; be like Tony, Alan. Be like lovely, slow, willowy, rhythmical, anatomically conversant, friendly Tony Willoughby, well known in the best clubs and famous for his copulative technique.

'I'd rather have a boy really, first,' said Cork. 'I me an, when you've got one behind you, you can branch out. Mind you, I don't hold with large families I will say. Not unless you can solve the servant problem. Are you married by the by? Oh dear, sorry I asked.'

Suppose for a moment that that furious private journey in Registry was the result of a dormant Communist sympathy reawakened by the events of last autumn; suppose that was what had driven him. Then to what hasty end was his fury directed ? Merely to the deadline dictated by a greedy master? The first stage was easily deduced: Karfeld came to power in October. From then on, a popular nationalist party was a reality; even a nationalist government was not impossible. For a month, two months, Harting broods. He sees Karfeld's face on every hoarding, hears the familiar slogans. 'He really is an invitation to Communism,' de Lisle had said... The awakening is slow and reluctant, the old associations and sympathies lie deep and are slow in coming to the surface. Then the moment of decision, the turning point. Either alone, or as a result of Praschko's persuasion, he determines to betray. Praschko approaches him: the Green File. Get the Green File and our old cause will be served.... Get the Green File by decision-day in Brussels... The contents of that file, Bradfield had said, could effectively compromise our entire posture in Brussels...

Or was he being blackmailed? Was that the nature of the race? Must he choose between satisfying a greedy master or being compromised by an unknown indiscretion? Was there something in the Cologne incident, for example, which reflected to his discredit: a woman, an involvement in some seedy racket? Had he embezzled Rhine Army funds? Was he selling off tax-free whisky and cigarettes? Had he drifted in to a homosexual entanglement? Had he, in fact, succumbed to anyone of the dozen classic temptations which are the staple diet of diplomatic espionage? Girl, replace those jeans immediately.

It was not in character. De Lisle was right: there was a thrust, a driving purpose to Harting's actions which went beyond self-preservation; an aggression, a ruthlessness, a fervour which was infinitely more positive than the reluctant compliance of a man under threat. In this underworld life which Turner was now investigating, Harting was not a servant but a principal. He was not deputed but appointed; he was not oppressed, but an oppressor, a hunter, a pursuer. In that, at least, there was an identity between Turner and Harting. But Turner's quarry was named. His tracks, up to a point, were clear. Beyond that point they vanished in to the Rhine mist. And most confusing of all was this: though Harting hunted alone, Turner reflected, he had not wanted for patronage...

Was Harting blackmailing Bradfield?

Turner asked the question suddenly, sitting up quite straight. Was that the explanation of Bradfield's reluctant protection? Was that why he had found him work in Registry, allowed him to vanish without explanation on Thursday afternoons, to wander round the corridors with a briefcase?

He looked once more at the diary and thought: question fundamentals. Madam, show this tired schoolboy your fundamentals, learn the parts, read the book from scratch... that was your tutor's advice and who are you to ignore the advice of your tutor. Do not ask why Christ was born on Christmas Day, ask whether he was born at all. If God gave us our wit, my dear Turner, He gave us also the wit to see through His simplicity. So why Thursday at all? Why the afternoon? Why regular meetings? However desperate, why did Harting meet his contact in the daylight, in working hours, in Godesberg, when his absence from the Embassy had to be the occasion of a lie in the first place? It was absurd. Balls, Turner, such as they are. Harting could meet his contact at any time. At night in Königswinter;on the forest slopes of Chamberlain's Petersberg; in Cologne, Koblenz, in Luxembourg or over the Dutch border at weekends when no excuse, truthful or untruthful, need be offered to anyone.

He dropped his pencil and swore out loud.

'Trouble?' Cork enquired. The robots were chattering wildly and Cork was tending them like hungry children.

'Nothing that prayer won't cure,' said Turner, recalling something he had said to Gaunt that morning.

'If you want to send that telegram,' Cork warned him, unperturbed, 'you'd better hurry.' He was moving quickly from one machine to the other, tugging at papers and knobs as if his task were to keep them all at work. 'The balloon's going up in Brussels by the look of it. Threat of a complete Hun walk-out if we don't raise our ante on the Agricultural Fund. Haliday-Pride says he thinks it's a pretext. In half an hour I'll be taking bookings for June if we go on at this rate.'

'What sort of pretext?'

Cork read out loud. ' A convenient door by which to leave Brussels until the situation in the Federal Republic returns to normal.'

Yawning, Turner pushed the telegram forms aside. 'I'll send it tomorrow.'

'It is tomorrow,' said Cork gently.

If I smoked I'd smoke one of your cigars. I could do with a bit of soma just now, he thought; if I can't have one of those , I'll have a cigar instead. From beginning to end, he knew the whole thesis was wrong.

Nothing worked, nothing interlocked, nothing explained the energy , nothing explained itself. He had constructed a chain of which no one link was capable of supporting the others. Holding his head in his hand, he let the Furies loose and watched them posture in grotesque slow motion before his tired imagination: the faceless Praschko, master spy, controlling from a position of parliamentary impregnability a network of refugee agents; Siebkron, the self-seeking custodian of public security, suspecting the Embassy of complicity in a massive betrayal to Russia, alternately guarding and persecuting those whom he believes to be responsible. Bradfield, rigorous, upper-class academic, hater and protector of spies, inscrutable for all his guilty knowledge, keeper of the keys to Registry, to the lift and the despatch box, about to vanish to Brussels after staying up all night; fornicating Jenny Pargiter, compelled in to far more sinister complicity by an illusory passion which had already blackened her name all over the Embassy; Meadowes, blinded by a frustrated father's love for the little Harting, precariously loading the last of the forty files on to his trolley; de Lisle, the ethical queer, fighting for Harting's right to betray his friends. Each, magnified and distorted, looked towards him, danced, twisted and vanished in the face of Turner's own derisive objections. The very facts which only hours before had brought him to the brink of revelation now threw him back in to the forests of his own doubt.

Yet how else, he told himself, as he locked a way his possessions in the steel cupboard and abandoned Cork to the protesting machines; how else, the minister would ask, breaking the seed cake on the little plate with his soft, enormous hand, how else do fancies multiply, how else is wisdom forged, and a course of Christian action finally resolved upon, if not through doubt? Surely, my dear Mrs Turner, doubt is Our Lord's greatest gift to those in need of faith? As he walked in to the corridor feeling giddy and very sick, he asked himself once more: what secrets are kept in the magic Green File? And who the hell is going to tell me: me, Turner, a temporary?

The dew was rising out of the field and rolling on to the carriageway like steam. The roads glistened under the wet grey clouds, the wheels of the traffic crackled in the heavy damp. Back to the grey, he thought wearily. No more hunt today. No little angel to submit to this old hairless ape. No absolutes yet at the end of the trail; nothing to make a defector of me.

The night porter at the Adler looked at him kindly. 'You were entertained?' he asked, handing him the key.

'Not much.'

'One should go to Cologne. It is like Paris.'

De Lisle's dinner jacket was draped carefully over his armchair with an envelope pinned to the sleeve. A bottle of Naafi whisky stood on the table. 'If you want to take a look at that property,' Turner read, 'I'llcollect you on Wednesday morning at five.' A postscript wished him a pleasant evening at the Bradfields, and requested him in a facetious aside not to pour tomato soup down the lapels as de Lisle did not wish to have his politics misread; particularly, he added, since Herr Ludwig Siebkron of the Federal Ministry of the Interior was expected to be of the company.

Turner ran a bath, took the tumbler from the basin and half filled it with whisky. Why had de Lisle relented? Out of compassion for a lost soul? Save us. And since this was the end to a night of silly questions, why was he being invited to meet Siebkron? He went to bed and half slept until afternoon, dreaming of Bournemouth and the spiky, unclimbable conifers that ran a long the bare cliffs at Branksome; and he heard his wife say, as she packed the children's clothes in to the suitcase, 'I'll find my road, you find yours, and let's see who gets to Heaven first.' And he heard Jenny Pargiter's crying again, on and on, a call for pity in an empty world. Don't worry, Arthur, he thought, I wouldn't go near Myra to save my life.