Yet however pleasant Harry could now be as a companion, with him at my side I was no longer free to slip away to meet Ralph by the river, on the common land or on the downs. As the days went on, I grew more and more impatient with Harry always at my side. I could not get rid of him. Mama wanted him to sing to her; Papa needed him to ride to Chichester, but Harry chose to go with me, while Ralph waited and waited and I burned up with desire.

‘Every time I order my horse from the stables, he has to go riding, too,’ I complained to Ralph in a snatched moment as we met by accident on the drive. ‘Every time I go into a room in the house he trails around after me.’

Ralph’s bright dark eyes shone with interest.

‘Why does he follow you so close? I thought he was tied to your mother’s apron strings?’

‘I don’t know,’ I said. ‘He’s never paid much heed to me before. Now I can’t shake him off.’

‘Maybe he wants you,’ said Ralph outrageously.

‘Don’t be silly,’ I said. ‘He’s my brother.’

‘Maybe he’s learned something at that school of his,’ Ralph persisted. ‘Perhaps he’s had a wench at school and learned to look at a girl. Maybe he sees, like I saw, that you are young and burning and ready for pleasure. Maybe he’s been away from home so long he’s forgotten he should think of you as a sister and just knows he’s in the same house as a girl who is warmer and lovelier every day and looks just about ready for all that a man could offer.’

‘Nonsense,’ I said. ‘I just wish he would leave me alone.’

‘Is this him?’ Ralph asked, nodding to an approaching horseman. My brother, in a riding coat of warm brown, which set off his broadening shoulders, was trotting towards us. He looked, surprisingly, like a young copy of my father, mounted on one of the high Wideacre hunters. He had my father’s proud, easy way and his ready smile. But Harry’s sweetness was all his own and his lithe slimness showed no sign of Papa’s broad solidity.

‘It’s him,’ I confirmed. ‘Be careful.’

Ralph stood a little back from my horse’s head, and pulled his forelock respectfully to my brother.

‘Sir,’ he said.

Harry nodded at him with a sweet smile.

‘I thought I’d ride with you, Beatrice,’ he said. ‘We could go up on the downs for a gallop.’

‘Certainly,’ I said. ‘This is Ralph, Meg’s son, the gamekeeper’s lad.’ Some devil prompted me to make them face each other, but my brother barely glanced at him. Ralph said nothing, but watched my brother intently. Harry simply did not realize Ralph was there.

‘Shall we go?’ he said, smiling. With a sudden shock I remembered the gulf between Ralph and me, which I had forgotten in the days of sensuality under the equal sky. Harry, of my blood and my Quality, ignored Ralph because Ralph was a servant. People like us, my brother and me, were surrounded by hundreds and thousands of our people who meant nothing; whose opinions, loves, fears and hopes never could mean anything to us. We might take an interest in their lives, or we might ignore them completely. It depended wholly on ourselves. They had no choice in the matter. For the first time, seeing Ralph beside my graceful, princely, high-riding brother, I blushed in a horror of shame, and the dreams of those spring days seemed a nightmare.

We turned our horses and moved off. I felt Ralph’s eyes on us as he watched us ride away, but this time they did not fill me with joy but with dread. I rode stiff-backed, and my mare felt my unease and pricked her ears and was wary.

I was proud, but I was young and sensual and it had been many days since I had been alone with Ralph. The track up to the downs was where I had ridden with my father on the first day I had seen the sweep of Wideacre from horseback, and it was a favourite meeting place for Ralph and me. As we rode through the beech coppice I could remember a long lazy afternoon of teasing each other’s desire in a deep shady hollow, and as the horses climbed to the highest point of the downs they passed one of our little nests of ferns. My shame faded in the memory of pleasure.

In that spot, only a few yards from the hoofs of my brother’s horse, I had insisted that Ralph lie as still as a statue while I undressed him and ran my tongue and the long tresses of my hair all over his body. He had groaned with desire and with the conflicting pain of the struggle to lie still. In sweet revenge, he had laid me on the grass and kissed me lingeringly all over, in every unexplored sensitive crevice of my naked body. Only when I was actually weeping with longing did he slide into me.

Remembering that pleasure made me burn with a wet heat and I glanced sideways at my brother in sudden dislike that he should interrupt my summer with Ralph now the bracken stood high to hide us, and only a soaring peregrine falcon could see with his sharp black eyes our secret nakedness.

I said suddenly, ‘I have to go, Harry. I am not well. It is one of my headaches.’

He looked at me with quick concern. I felt a passing pity at his tender gullibility.

‘Beatrice! Let me take you home.’

‘No, no,’ I said, maintaining the pretence. ‘You enjoy your ride. I shall go to Meg’s house and have some of her feverfew tea. That always cures them.’

I cut short his protests and anxiety by turning my horse back down the way we had come. I felt his eyes upon me and drooped in the saddle as if every step jolted my aching head. But once I was under the shelter of the beech trees, and out of sight, I sat up and swung along at a good pace back down the track. I took the short cut to Meg’s cottage — not up the drive but a neat little jump over the park wall — and then a brisk canter alongside the Fenny to where the little heap of a house slumbered in the sunshine. Ralph was sitting outside, his dog outstretched beside him, knotting a cord into a snare. At the very sight of him my heart twisted inside me. He heard the horse’s hoofbeats and laid his work aside. His smile as he walked to the gate to meet me was warm and easy.

‘Shaken off your high and mighty brother then?’ he asked. ‘I felt I was dirt on the road compared to him.’

I had no answering smile. The contrast between the two of them was too painful.

‘We rode on the downs,’ I said. ‘Near our places. I missed you too much. Let’s go to the mill.’

He nodded as if accepting an order and the smile had gone from his eyes. I tied the mare to the gate and followed him along the little path. As soon as he was inside the door he turned, took me in his arms and started to say something, but I dragged him down to the straw and said urgently, ‘Just do it, Ralph.’

Then my anger and my sadness melted as I felt the familiar, ever new pleasure starting to warm me. He kissed me hard with an anger and sorrow of his own, and then opened the front of my gown at the neck. With shaking fingers I untied the leather thongs at the front lap of his breeches while he fumbled among the layers of petticoats under my riding habit. I said impatiently, ‘Let me!’ and swept the habit and petticoats off over my head.

Naked, I spread myself under him and shivered with pleasure as his weight came down on me. We were panting like hounds, hard-pressed. My hands gripped his buttocks forcing him into me, and in some distant recess in my head I could hear my sobbing whimper of pleasure settle into a rhythm of sighs that matched the rocking of our loving bodies. Then the great half-door swung wide open and a white wall of brilliant sunshine fell on us like a physical blow. For a second we were frozen with shock and terror, Ralph twisting round and me peeping white-faced over his shoulder.

In the sunlit archway stood my brother, his eyes blinking in the gloom, peering at the sight of his naked sister impaled by lust on a dirty threshing floor. For a split second nothing moved, like an obscene tableau, then Ralph leaped off me. I rolled to one side, crouching for my clothes and Ralph hitched his leather breeches over his hard nakedness. Still no one spoke. The silence lasted a lifetime. I stood, my new riding habit clutched to my naked breasts, staring at my brother in a sort of terror.

Then Harry gave a choking cry and rushed at Ralph with his riding whip upraised. Ralph was heavier and taller, and had been fighting village lads since he could walk. He fended Harry off and Harry’s wild blows with the whip fell only on his arms and shoulders. But then a cut across his cheek slashed him into anger and he jerked the whip from Harry, thumped him hard in the belly and tripped him roughly to the floor. Harry thudded down on his back and a sharp kick from Ralph’s foot into the crutch made him scissor together in a ball. He cried out, I thought in pain, and I called urgently, ‘Ralph. No!’

But then my brother’s face lifted from the dusty straw and I saw his angelic smile and the haze of his blue eyes. My blood ran cold as I recognized Harry’s blissful expression of happiness as he lay in the dirt at Ralph’s feet and gazed slavishly up the length of his tall body and at the whip in his hand. He shifted his body in the dust and crawled towards Ralph’s bare feet.

‘Beat me,’ he said in a begging, childish voice. ‘Oh please, beat me.’

As Ralph’s incredulous eyes met mine in the dawning realization that we would escape scot-free, I knew at last why my brother had been expelled and the mark Dr Yately’s school had left on him for life.

Ralph’s light flicks of the whip slapped Harry’s well-cut jacket and breeches and Harry tightened his grip on Ralph’s naked foot and gave a sharp cry then a shuddering sigh of pleasure. The future Master of Wideacre sobbed like a baby with his face buried in dirty straw, his hands cupping a labourer’s foot. Ralph and I looked at each other in utter silence.