Of course it was never hard, not like trapeze work or horsetraining. But it was wearying in a way that those skills had not been. I found I was as tired in the evenings as if I had been working hard each day, and I could not think what ailed me. Lady Clara never stopped watching me, she had me walk across the room a dozen times, she had me sit in a chair and get up again, over and over. She ordered the carriage out into the yard, and a phaeton and a curricle, and sent me up and down the steps into each of them time after time, until I could engage not to tread on the hem of my gown, or bang my bonnet on the carriage roof.

At mealtimes we dined quite alone. Not even Perry ate with us; the servants laid the table and were then dismissed. Then patiently, like a warder with an idiot, she taught me how to hold my knife and, at the same time, to hold my fork, how to put them down on the plate between mouthfuls, how to drink from my glass only when my mouth was empty so there was no greasy stain left on the rim. How to talk while I ate, and how to cope with chicken wings and chop bones without seizing them up and gnawing and sucking at them. She taught me to wipe the tips of my fingers on my napkin, she taught me to balance it on my knees so that it did not slide to the floor. How much wine to drink, and when it was polite to refuse or polite to accept.

All the time, every minute of the day, she corrected my speech. By just raising one of her arched eyebrows she warned me that I was talking Rom, talking rough, or talking bawdy. Over and over again I would try to tell her something and she would make me try the phrase, like a horse at a difficult jump, until I could get it out with the right words and the right inflexion.

‘Fortunately, some of the best ladies in society talk like farm-hands,’ she said acidly. ‘And a good few can read and write no more than you. But still you will learn, Sarah. You are coming along fast.’

I could not help but respect her. She never so much as flickered one of her long-lashed eyes, whatever I did. Whatever the mistakes I made – and I was too ignorant even to know how much she must be offended – she never even looked surprised. One evening, after an especially hard day when she had been trying to teach me to pick flowers in the garden and arrange them in a glass, I had burst out: