Bradfield led the way; de Lisle and Turner followed. It was early evening and the streets were empty of traffic. In all Bonn, nothing stirred but the mute, grey-clad strangers who swarmed the alleys and hastened towards the market square. The black bunting, becalmed, drifted in idle swathes over the ebbing tide.

Bonn had never seen such faces. The old and the young, the lost and the found, the fed and the hungry, the clever, the dull, the governed and the ungoverned, all the children of the Republic, it seemed, had risen in a single legion to march upon her little bastions. Some were hillsmen, darkhaired, straddle-legged and scrubbed for the outing; some were clerks, Bob Cratchits nipped by the quick air; some were Sunday men, the slow infantry of the German promenade, in grey gabardine and grey Homburg hats.

Some carried their flags shamefully, as if they had outgrown them, some as banners borne to the battle, others as ravens strung for market. Birnam Wood had come to Dunsinane.

Bradfield waited for them to catch up.

'Siebkron reserved space for us. We should enter the square higher up. We shall have to force our way to the right.' Turner nodded, barely hearing. He was looking everywhere, in to every face and every window, every shop, corner and alley.

Once he seized de Lisle's arm, but whoever it was had gone, lost again in the changing mass.

Not just the square itself: balconies, windows, shops, every foothold and crevice was filled with grey coats and white faces, and the green uniforms of soldiers and police. And still they came, more of them, cramming the mouths of the darkening alleys, craning their necks for a sight of the speaker's stand, searching for a leader, faceless men searching for one face; while Turner peered desperately among them for a face he had never seen. Overhead, in front of the floodlights, loudspeakers hung like warnings from their wires; beyond them, the sky was failing.

He'll never make it, Turner thought dully; he'll never penetrate a crowd like this. But Hazel Bradfield's voice came back to him: I had a younger brother, he played scrum-half; you could hardly tell them apart. 'To the left,' Bradfield said. 'Make for the hotel.'

'You are English?' a woman's voice enquired, teatime in a friendly house. 'My daughter lives in Yarmouth.' But the tide carried her a way. Furled banners barred their path, dropped like lances. The banners formed a ring, and the gypsy students stood inside it, gathered round their own small fire. 'Burn Axel Springer,' one boy shouted, not with much conviction, and another broke a book and threw it on the flames. The book burned badly, choking before it died. I shouldn't have done that to the books, Turner thought; I'll be doing it to people next. A group of girls lounged on mattresses and the fire made poems of their faces.

'If we're separated, meet on the steps of the Stern,' Bradfield ordered. A boy heard him and ran forward, encouraged by the others. Two girls were already shouting in French. 'You are English!' the boy cried, though his face was young and nervous.

'English swine!' Hearing the girls again, he swung his small fist wildly over the lances. Turner hastened forward, but the blow fell on Bradfield's shoulder and he paid it no attention. The crowd gave way, suddenly, its will mysteriously gone, and the Town Hall appeared before them at the far end of the square, and that was the night's first dream. A magic baroque mountain of candy pink and merchant gold. A vision of style and elegance, of silk and filigree and sunlight. A vision of brilliance and Latin glory, palaces where de Lisle's unplayed minuets pleased the plumper burgher's heart. To its left the scaffold, still in darkness, cut off by the screen of arclights trained upon the building, waited like an executioner upon the imperial presence.

'Herr Bradfield?' the pale detective asked. He had not changed his leather coat since that dawn in Königswinter, but there were two teeth missing from his black mouth. The moon faces of his colleagues stirred in recognition of the name.

'I'm Bradfield, yes.'

'We are ordered to free the steps for you.' His English was rehearsed: a small part for a newcomer. The radio in his leather pocket crackled in urgent command. He lifted it to his mouth. The diplomatic gentlemen had arrived, he said, and were safely in position. The gentleman from Research was also present.

Turner looked pointedly at the broken mouth and smiled.

'You sod,' he said with satisfaction. The lip was badly cut as well, though not as badly as Turner's.

'Please?'

'Sod,' Turner explained. 'Sodomite.'

'Shut up,' said Bradfield.

The steps commanded a view of the entire square. Already the afternoon had turned to twilight; the victorious arclights divided the numberless heads in to white patches which floated like pale discs upon a black sea. Houses, shops, cinemas had fallen a way.Only their gables remained, carved in fairytale silhouette against the dark sky, and that was the second dream; Tales of Hoffman , the woodcut world of German make-believe to prolong the German childhood. High on a roof a Coca-Cola sign, winking on and off, tinged the surrounding tiles with cosmetic pink; once an errant spotlight ran across thefaçades, peering with a lover's eye in to the empty windows of the stores. On the lower step, the detectives waited, backs towards them, hands in pockets, black against the haze.

'Karfeld will come in from the side,' de Lisle said suddenly.

'The alley to the left.'

Following the direction of de Lisle's outstretched arm, Turner noticed for the first time directly beneath the feet of the scaffold a tiny passageway between the pharmacy and the Town Hall, not more than ten foot wide and made very deep by the high walls of the adjacent buildings.

'We remain here, is that clearly understood? On these steps.

Whatever happens. We are here as observers; merely observers, nothing more.' Bradfield's strict features were strengthened by dilemma. 'If they find him they will deliver him to us. That is the understanding. We shall take him at once to the Embassy for safe custody.'

Music, Turner remembered. In Hanover he tried when the music was loudest. The music is supposed to drown the shot. He remembered the hair-dryers too and thought: he's not a man to vary the technique; if it worked before, it will work again, and that's the German in him; like Karfeld and the grey buses.

His thoughts were lost to the murmur of the crowd, the pleasurable growl of expectation which mounted like an angry prayer as the floodlights died. Only the Town Hall remained, a pure and radiant altar, tended by the little group which had appeared upon its balcony. The names rose in countless mouths as all around him, the slow liturgical commentary began: Tilsit, Tilsit was there, Tilsit the old General, the third from the left, and look, he is wearing his medal, the only one they wanted to deny him, his special medal from the war, he wears it round his neck, Tilsit is a man of courage. Meyer Lothringen, the economist! Yes, der Grosse ,the tall one, how elegantly he waves, it is well known that he is of the best family; half a Wittelsbach, they say; blood will tell in the end; and a great academic; he understands everything. And priests! The Bishop! Look, the Bishop himself is blessing us! Count the movements of his holy hand! Now he is looking to his right! He has reached out his arm! And Halbach the young hothead: look, he is wearing a pullover!

Fantastic, his impertinence: a pullover on such an occasion! In Bonn? Halbach! nu toller Hund ! But Halbach is from Berlin, and Berliners are famous for their arrogance; one day he will lead us all, so young and yet already so successful.

The murmur rose to a roar, a visceral, hungry, loving roar, deeper than any single throat, more pious than any single soul, more loving than any single heart; and died again, whispering down, as the first quiet chords of music struck. The Town Hall receded and the scaffolding stood before them. A preacher's pulpit, a captain's bridge, a conductor's rostrum? A child's cradle, a plain coffin of boldly simple wood, grandiose yet virtuous, a wooden grail, housing the German truth. Upon it, alone but valiant, the truth's one champion, a plain man known as Karfeld.

'Peter.' Turner gently pointed into the tiny alley. His hand was shaking but his eye was quite steady. A shadow? A guard taking up his post?

'I wouldn't point any more if I was you,' de Lisle whispered. 'They might misunderstand you.'

But in that moment, no one paid them any heed, for Karfeld was all they saw.

'Der Klaus!' the crowd was calling. 'Der Klaus is here!' Wave to him, children; der Klaus, the magic man, has walked all the way to Bonn on stilts of German pine.

'He is very English, der Klaus,' he heard de Lisle murmur. 'Although he hates our guts.'

He was such a little man up there. They said he was tall; and it would have been easy enough, with so much artifice, to raise him a toot or so, but he seemed to wish to be diminished, as if to emphasise that great truths are found in humble mouths; for Karfeld was a humble man, and English in his diffidence. And Karfeld was a nervous man too,

bothered by his spectacles, which he had not had time to clean, apparently, in these busy days, for now he took them off and polished them as if he did not know he was observed: it is the others who make the ceremony, he was telling them, before he had said a word; it is you and I who know why we are here.

Let us pray.

'The lights are too bright for him,' someone said. 'They should reduce the lights.'

He was one of them, this isolated Doctor; a good deal of brain power no doubt, a good deal above the ears, but still one of them at the end of it, ready to step down at any time from that high place if someone better came along. And not at all a politician. Quite without ambition, in fact, for he had only yesterday promised to stand down in favour of Halbach if that was the people's will. The crowd whispered its concern. Karfeld looks tired, he looks fresh; he looks well; Karfeld looks ill, older, younger, taller, shorter... It is said he is retiring; no, he will give up his factory and work full time on politics. He cannot afford it; he is a millionaire.

Quietly he began speaking.

No one introduced him, he did not say his name. The note of music which announced his coming had no companions, for Klaus Karfeld is alone up there, quite alone, and no music can console him. Karfeld is not a Bonn windbag; he is one of us for all his intellect: Klaus Karfeld, doctor and citizen, a decent man decently concerned about the fate of Germany, is obliged, out of a sense of honour, to address a few friends. It was so softly, so unobtrusively done, that to Turner it seemed that the whole massive gathering actually inclined its ear in order to save Karfeld the pain of raising his voice.