They travelled by the Central Line to Liverpool Street and caught the 17.36 train to Cambridge with plenty of time. Miss Learning bought Cordelia's ticket, collected a portable typewriter and a briefcase of papers from the left luggage department and led the way to a first-class carriage. She said:

'I shall have to work in the train; have you anything to read?'

'That's all right. I don't like talking when I'm travelling either. I've got Hardy's Trumpet Major – I always have a paperback in my bag.'

After Bishops Stortford they had the compartment to themselves but only once did Miss Learning look up from her work to question Cordelia.

'How did you come to be working for Mr Pryde?'

'After I left school I went to live with my father on the continent. We travelled around a good deal. He died in Rome last May after a heart attack and I came home. I had taught myself some shorthand and typing so I took a job with a secretarial agency. They sent me to Bernie and after a few weeks he let me help him with one or two of the cases. He decided to train me and I agreed to stay on permanently. Two months ago he made me his partner.'

All that had meant was that Cordelia gave up a regular wage in return for the uncertain rewards of success in the form of an equal share of the profits together with a rent-free bed-sitting-room in Bernie's house. He hadn't meant to cheat. The offer of the partnership had been made in the genuine belief that she would recognize it for what it was; not a good conduct prize but an accolade of trust.

'What was your father?'

'He was an itinerant Marxist poet and an amateur revolutionary.'

'You must have had an interesting childhood.'

Remembering the succession of foster mothers, the unexplained incomprehensible moves from house to house, the changes of schools, the concerned faces of Local Authority Welfare Officers and school teachers desperately wondering what to do with her in the holidays, Cordelia replied as she always did to this assertion, gravely and without irony.

'Yes, it was very interesting.'

'And what was this training you received from Mr Pryde?'

'Bernie taught me some of the things he learnt in the CID: how to search the scene of a crime properly, how to collect exhibits, some elementary self-defence, how to detect and lift fingerprints – that kind of thing.'

'Those are skills which I hardly feel you will find appropriate to this case.'

Miss Learning bent her head over her papers and did not speak again until the train reached Cambridge.

Outside the station Miss Learning briefly surveyed the car-park and led the way towards a small black van. Standing beside it rigidly as a uniformed chauffeur, was a stockily built young man dressed in an open-necked white shirt, dark breeches and tall boots who Miss Learning introduced casually and without explanation as 'Lunn'. He nodded briefly in acknowledgement of the introduction but did not smile. Cordelia held out her hand. His grip was momentary but remarkably strong, crushing her fingers; suppressing a grimace of pain she saw a flicker in the large mud-brown eyes and wondered if he had hurt her deliberately. The eyes were certainly memorable and beautiful, moist calves' eyes heavily lashed and with the same look of troubled pain at the unpredictability of the world's terrors. But their beauty emphasized rather than redeemed the unattractiveness of the rest of him. He was, she thought, a sinister study in black and white with his thick, short neck and powerful shoulders straining the seams of his shirt. He had a helmet of strong black hair, a pudgy slightly pock-marked face and a moist petulant mouth; the face of a ribald cherub. He was a man who sweated profusely; the under-arms of his shirt were stained and the cotton stuck to the flesh emphasizing the strong curve of the back and the obtrusive biceps.

Cordelia saw that the three of them were to sit squashed together in the front of the van. Lunn held open the door without apology except to state:

'The Rover's still in dock.'

Miss Learning hung back so that Cordelia was compelled to get in first and sit beside him. She thought: 'They don't like each other and he resents me.'

She wondered, about his position in Sir Ronald Callender's household. Miss Learning's place she had already guessed; no ordinary secretary however long in service, however indispensable, had quite that air of authority or talked of 'my employer' in that tone of possessive irony. But she wondered about Lunn. He didn't behave like a subordinate but nor did he strike her as a scientist. True,"scientists” were alien creatures to her. Sister Mary Magdalen was the only one she had known. Sister had taught what the syllabus dignified as general science, a hotch-potch of elementary physics, chemistry and biology unceremoniously lumped together. Science subjects were in general little regarded at the Convent of the Immaculate Conception, although the arts were well taught. Sister Mary Magdalen had been an elderly and timid nun, eyes puzzled behind steel-rimmed spectacles, her clumsy fingers permanently stained with chemicals, who had apparently been as surprised as her pupils at the extraordinary explosions and fumes which her activities with test tube and flask had occasionally produced. She had been more concerned to demonstrate the incomprehensibility of the universe and the inscrutability of God's laws than to reveal scientific principles and in this she had certainly succeeded. Cordelia felt that Sister Mary Magdalen would be no help to her in dealing with Sir Ronald Callender; Sir Ronald who had campaigned in the cause of conservation long before his interest became a popular obsession, who had represented his country at international conferences on ecology and been knighted for his services to conservation. All this Cordelia, like the rest of the country, knew from his television appearances and the Sunday colour supplements. He was the establishment scientist, carefully uncommitted politically, who personified to everyone's reassurance the poor boy who had made good and stayed good. How, Cordelia wondered, had he come to think of employing Bernie Pryde?

Uncertain how far Lunn was in his employer's or Miss Learning's confidence, she asked carefully:

'How did Sir Ronald hear about Bernie?'

'John Bellinger told him.'

So the Bellinger bonus had arrived at last! Bernie had always expected it. The Bellinger case had been his most lucrative, perhaps his only, success. John Bellinger was the director of a small family firm which manufactured specialized scientific instruments. The previous year his office had been plagued by an outbreak of obscene letters and, unwilling to call in the police, he had telephoned Bernie. Bernie, taken on the staff at his own suggestion as a messenger, had quickly solved a not very difficult problem. The writer had been Bellinger's middle-aged and highly regarded personal secretary. Bellinger had been grateful. Bernie,. after anxious thought and consultation with Cordelia, had sent in a bill the size of which had astounded them both and the bill had been promptly paid. It had kept the Agency going for a month. Bernie had said: 'We'll get a bonus from the Bellinger case, see if we don't. Anything can happen in this job. He only chose us by picking our name from the telephone directory but now he'll recommend us to his friends. This case could be the beginning of something big.'

And now, thought Cordelia, on the day of Bernie's funeral, the Bellinger bonus had arrived.

She asked no more questions and the drive, which took less than thirty minutes, passed in silence. The three of them sat thigh to thigh, but distanced. She saw nothing of the city. At the end of Station Road by the War Memorial the car turned to the left and soon they were in the country. There were wide fields of young corn, the occasional stretch of tree-lined dappled shade, straggling villages of thatched cottages and squat red villas strung along the road, low uplands from which Cordelia could see the towers and spires of the city, shining with deceptive nearness in the evening sun. Finally, there was another village, a thin belt of elms fringing the road, a long curving wall of red brick and the van turned in through open wrought-iron gates. They had arrived.