'Sir,' said Roach but Jim made no move.

'Trouble with an Alvis is, no damn springs,' said Jim at last, more to the window than to his visitor. 'You drive along with your rump on the white line, eh? Cripple anybody.' And, tilting his trunk again, he drank.

'Yes, sir,' said Roach, much surprised that Jim should assume he was a driver.

Jim had taken off his hat. His sandy hair was close cropped, there were patches where someone had gone too low with the scissors. These patches were mainly on one side, so that Roach guessed that Jim had cut his hair himself with his good arm, which made him even more lopsided.

'I brought you a marble,' said Roach.

'Very good of you. Thanks, old boy.' Taking the marble he slowly rolled it round his hard, powdery palm and Roach knew at once that he was very skilful at all sorts of things; that he was the kind of man who lived on terms with tools and objects generally. 'Not level, you see, Bill,' he confided, still intent upon the marble. 'Skew-whiff. Like me. Watch,' and turned purposefully to the larger window. A strip of aluminium beading ran along the bottom, put there to catch the condensation. Laying the marble in it, Jim watched it roll to the end and fall on the floor.

'Skew-whiff,' he repeated. 'Kipping in the stem. Can't have that, can we? Hey, hey, where'd you get to, you little brute?'

The caravan was not a homely place, Roach noticed, stooping to retrieve the marble. It might have belonged to anyone, though it was scrupulously clean. A bunk, a kitchen chair, a ship's stove, a Calor gas cylinder. Not even a picture of his wife, thought Roach, who had not yet met a bachelor, with the exception of Mr Thursgood. The only personal things he could find were a webbing kitbag hanging from the door, a set of sewing things stored beside the bunk and a homemade shower made from a perforated biscuit tin and neatly welded to the roof. And on the table one bottle of colourless drink, gin or vodka, because that was what his father drank when Roach went to his flat for weekends in the holidays.

'East-west looks okay but north-south is undoubtedly skew-whiff,' Jim declared, testing the other window ledge. 'What are you good at, Bill?'

'I don't know, sir,' said Roach woodenly.

'Got to be good at something surely, everyone is. How about football? Are you good at football, Bill?'

'No, sir,' said Roach.

'Are you a swat, then?' Jim asked carelessly, as he lowered himself with a short grunt on to the bed, and took a pull from the beaker. 'You don't look a swat I must say,' he added politely. 'Although you're a loner.'

'I don't know,' Roach repeated and moved half a pace towards the open door.

'What's your best thing, then?' He took another long sip. 'Must be good at something, Bill, everyone is. My best thing was ducks and drakes. Cheers.'

Now this was an unfortunate question to ask of Roach just then for it occupied most of his waking hours. Indeed he had recently come to doubt whether he had any purpose on earth at all. In work and play he considered himself seriously inadequate; even the daily routine of the school, such as making his bed and tidying his clothes, seemed to be beyond his reach. Also he lacked piety, old Mrs Thursgood had told him so, he screwed up his face too much at chapel. He blamed himself very much for these shortcomings but most of all he blamed himself for the break-up of his parents' marriage, which he should have seen coming and taken steps to prevent. He even wondered whether he was more directly responsible, whether for instance he was abnormally wicked or divisive or slothful, and that his bad character had wrought the rift. At his last school he had tried to explain this by screaming and feigning fits of cerebral palsy, which his aunt had. His parents conferred, as they frequently did in their reasonable way, and changed his school. Therefore this chance question, levelled at him in the cramped caravan by a creature at least half-way to divinity, a fellow solitary at that, brought him suddenly very near disaster. He felt the heat charging to his face, he watched his spectacles mist over and the caravan begin to dissolve into a sea of grief. Whether Jim noticed this, Roach never knew, for suddenly he had turned his crooked back on him, moved away to the table and was helping himself from the plastic beaker while he threw out saving phrases.

'You're a good watcher, anyway, I'll tell you that for nothing, old boy. Us singles always are, no one to rely on, what? No one else spotted me. Gave me a real turn up there, parked on the horizon. Thought you were a juju man. Best watcher in the unit, Bill Roach is, I'll bet. Long as he's got his specs on. What?'

'Yes,' Roach agreed gratefully, 'I am.'

'Well, you stay here and watch, then,' Jim commanded, clapping the safari hat back on his head, 'and I'll slip outside and trim the legs. Do that?'

'Yes, sir.'

'Where's damn marble?'

'Here, sir.'

'Call out when she moves, right? North, south, whichever way she rolls. Understand?'

'Yes, sir.'

'Know which way's north?'

'That way,' said Roach promptly and stuck out his arm at random.

'Right. Well, you call when she rolls,' Jim repeated and disappeared into the rain. A moment later Roach felt the ground swaying under his feet and heard another roar either of pain or anger, as Jim wrestled with an off-side prop.

In the course of that same summer term, the boys paid Jim the compliment of a nickname. They had several shots before they were happy. They tried Trooper, which caught the bit of military in him, his occasional, quite harmless cursing and his solitary rambles in the Quantocks. All the same Trooper didn't stick, so they tried Pirate and for a while Goulash. Goulash because of his taste for hot food, the smell of curries and onions and paprika that greeted them in warm puffs as they filed past the Dip on their way to Evensong. Goulash for his perfect French which was held to have a slushy quality. Spikely of Five B could imitate it to a hair: 'You heard the question, Berger. What is Emile looking at?' - a convulsive jerk of the right hand - 'Don't gawp at me, old boy, I'm not a juju man. Qu'est-ce qu'il regarde, Emile, dans le tableau que tu as sous le nez ? Mon cher Berger, if you do not very soon summon one lucid sentence of French, je te mettrai tout de suite à la porte, tu comprends, you beastly toad?'

But these terrible threats were never carried out, neither in French nor English. In a quaint way, they actually added to the aura of gentleness which quickly surrounded him, a gentleness only possible in big men seen through the eyes of boys.

Yet Goulash did not satisfy them either. It lacked the hint of strength contained. It took no account of Jim's passionate Englishness, which was the only subject where he could be relied on to waste time. Toad Spikely had only to venture one disparaging comment on the monarchy, extol the joys of some foreign country, preferably a hot one, for Jim to colour sharply and snap out a good three minutes' worth on the privilege of being born an Englishman. He knew they were teasing him but he was unable not to rise. Often he ended his homily with a rueful grin, and muttered references to red herrings and red marks too, and red faces when certain people would have to come in for extra work and miss their football. But England was his love; when it came down to it, no one suffered for her.

'Best place in the whole damn world!' he bellowed once. 'Know why? Know why, toad?'

Spikely did not, so Jim seized a crayon and drew a globe. To the west, America, he said, full of greedy fools fouling up their inheritance. To the east, China- Russia, he drew no distinction: boiler suits, prison camps and a damn long march to nowhere. In the middle...

Finally they hit on Rhino.

Partly this was a play on Prideaux, partly a reference to his taste for living off the land and his appetite for physical exercise which they noted constantly. Shivering in the shower queue first thing in the morning they would see the Rhino pounding down Combe Lane with a rucksack on his crooked back as he returned from his morning march. Going to bed they could glimpse his lonely shadow through the perspex roof of the fives court as the Rhino tirelessly attacked the concrete wall. And sometimes on warm evenings from their dormitory windows they would covertly watch him at golf, which he played with a dreadful old iron, zigzag across the playing fields, often after reading to them from an extremely English adventure book: Biggles, Percy Westerman or Jeffrey Farnol, grabbed haphazard from the dingy library. At each stroke they waited for the grunt as he started his backswing and they were seldom disappointed. They kept a meticulous score. At the staff cricket match he made seventy-five before dismissing himself with a ball deliberately lofted to Spikely at square leg. 'Catch, toad, catch it, go on. Well done, Spikely, good lad, that's what you're there for.'

He was also credited, despite his taste for tolerance, with a sound understanding of the criminal mind. There were several examples of this, but the most telling occurred a few days before the end of term, when Spikely discovered in Jim's waste basket a draft of the next day's examination paper, and rented it to candidates at five new pence a time. Several boys paid their shilling and spent an agonised night memorising answers by torchlight in their dormitories. But when the exam came round Jim presented a quite different paper.

'You can look at this one for nothing,' he bellowed as he sat down. And having hauled open his Daily Telegraph calmly gave himself over to the latest counsels of the juju men, which they understood to mean almost anyone with intellectual pretension, even if he wrote in the Queen's cause.

There was lastly the incident of the owl, which had a separate place in their opinion of him since it involved death, a phenomenon to which children react variously. The weather continuing cold, Jim brought a bucket of coal to his classroom and one Wednesday lit it in the grate, and sat there with his back to the warmth, reading a dictée. First some soot fell which he ignored, then the owl came down, a full-sized barn owl which had nested up there, no doubt, through many unswept winters and summers of Dover's rule, and was now smoked out, dazed and black from beating itself to exhaustion in the flue. It fell over the coals and collapsed in a heap on the wooden floorboard with a clatter and a scuffle, then lay like an emissary of the devil, hunched but breathing, wings stretched, staring straight out at the boys through the soot which caked its eyes. There was no one who was not frightened; even Spikely, a hero, was frightened. Except for Jim, who had in a second folded the beast together and taken it out of the door without a word. They heard nothing, though they listened like stowaways, till the sound of running water from down the corridor as Jim evidently washed his hands. 'He's having a pee,' said Spikely, which earned a nervous laugh. But as they filed out of the classroom they discovered the owl still folded, neatly dead and awaiting burial on top of the compost heap beside the Dip. Its neck, as the braver ones established, was snapped. Only a gamekeeper, declared Sudeley, who had one, would know how to kill an owl so well.