In the long-playing-record trunk in that library, there were also to be found the speeches of V. I. Lenin and a Russian phrase book from which I copied into my diary at that time ‘A rose is a flower. A man loves a woman. Death is inevitable.’ I also found a book on medieval Latin lyric by Helen Waddell and remember the words:

‘Vel confossus pariter

Morerer feliciter,’

that she translates as:

‘Low in the grave with thee

Happy to lie.’

I’ve used these words as soothers for years. They work as phrases whose meaning either dissolves, leaving you in a state of meditation, or tightens up, giving you plenty to think about.

I had discovered a great pleasure of the painful side of life: its relief, or exacerbation, by literature. Of course I’d been doing it all along but hadn’t realised.

It was typically bifocal of me to have lit upon the object of my distant love since his delightful brother was my first proper boyfriend. Between them, they constitute immortal disproof of the proposition that all Mitchisons are brilliant but not always super-subtle. Terence Mitchison was an undergraduate medieval historian at St Catherine’s College, Oxford, a place that was to recur and grow in my life. We met during the famous summer that Anthony Appiah, the grandson of Sir Stafford Cripps and nephew of the Queen of the Ashanti, said, and we were just thirteen, ‘It depends whether you have an eschatological Weltanschauung.’ The thing about Anthony was that he had some paisley flares and a blue rollneck and he could play the piano. The other thing was that we became best friends and that he’s never shown off in his life. He just was that far in front — like Prospero, but kinder.

Terence courted me with letters that would, if anyone knew where they were, constitute the most colourful archive you could wish for, literally. He breathed jokes, mainly of the verbal kind, and sent them to me colour-coded, brown for medieval jokes, green for rural jokes, pink for jokes to do with the history of Empire and so on. And, of course, puns resulted in multicoloured words. It was not that Terence was, as I am, a synaesthete whose synaesthesia is redundant or at any rate useless; he was an etymologist with a grip on detail. So considerable was this grip that when we took a holiday, later in our friendship, on a barge on the Brecon Beacon canal with schoolfriends, Terence had embroidered his Admiral’s cap with the barge’s name, Samuel Whiskers. Everything about Terence was thorough and good. He had embroidered another cap: HMS Leaky.

Which makes that swivel of disloyalty, or whatever it was, in me towards my idol, his older brother, extra mortifying, and I only hope Terence was well shot of his schoolgirl correspondent. At the start, I suspect that I fell, as through a trapdoor, for the blameless older brother for the simple, no doubt tediously biological, reason that he was, and remains, the single individual who has, since my mother and father, been able to carry me. His areas of specialism included blue-green algae and dreams. I used to read books about finite-dimensional vector space and Riemann surfaces to try to make myself appealing to this distinguished ludic individual. When he remarked, glancingly, that he thought blue more becoming than pink, I did as my mother would have and made a stew of woad, or rather Dylon dye, in Strong Navy and bunged all my clothes in. Nothing could have prepared this poor man for cause and its effect upon his silly child-friend.

I drooped around after him for pretty much a decade, during which his circle of friends, to some degree, took me up and conducted the kindest of intellectual experiments upon this peculiar child. So it was that I found myself building sandcastles (one, for example, of the Gesù in Rome) with the right-wing philosopher John Casey, being introduced to green Chartreuse by the composer Robin Holloway who later wrote me properly critical letters about my work, which he did not like; and becoming a friend for life of my idol’s lodger, with whom he would play piano duets, Roger Scruton, who was then a boy of twenty-seven with hair that flamed over a face that also burned white with seriousness. The architectural historian David Watkin taught me to dance the galope and asked me to marry him, which he must have forgotten, or at any rate I notice that we don’t seem to be married. They gave me books to read and were, I suppose, waiting to see what the result would be when I had ground my way through whatever it was: The Anatomy of Melancholy, Hadrian VII, The Quest for Corvo, all of Firbank, Memoirs of a Mathematician. Unknowing, I was a kind of Maisie. Their patience with me and tolerance of my mooncalf presence among them was admirable. I was a bit of a liver-enriched goose, I’m afraid. What kind of egg they expected me to lay I cannot imagine, but not this life that I am laying out now, I’m sure. I still possess the label of the 1955 Veuve Clicquot bottle that we shared, perhaps eight or ten of us, on my fifteenth birthday, over lunch. It is, with all my possessions, not to hand but in store, awaiting a return to a life unpacked.

Before these loves, though, came rupture and detachment from my father’s house in my early teens. He and I never exchanged words about it, but I left his home and did not come properly back to it again, and certainly not to live.

I had become compact of lies, a child of flies, a beelzebubbler, as my stepmother apprehended it, and she did not, quite understandably, want me near her children. I suspect too that I was growing to resemble my mother and that my father could not face another unhappy marriage; since the only thing that was wrong with his marriage to my stepmother was me, might there not be benefit for all concerned were I to be removed from the sum?

I had always fancied boarding school and now its allure was unequivocal. Several prospectuses were sent for. I liked the look of Cranborne Chase and Bedales. It turned out that my mother had left enough money for me to be sent away. I sat scholarships.

It was to Sherborne School for Girls in Dorset that I won a major scholarship. The adjustment from a school whose houses were called Argyll, Buccleuch, Douglas, Moray and Strathmore to an establishment for young ladies of England and the Commonwealth was actually not all that painful. The only sad thing was that I lost all trace of a Scottish accent, though my children tell me my voice changes as we cross the border north.

In the scholarship examination I had scored fewer than ten points out of a hundred for mathematics and these points given merely for the sake of face. A special division below all the others was created for me and for a girl who had been terribly damaged in a car accident. We were patiently taught by a Miss Hayward, who challenged us with such problems as: ‘You have a curtain rail that is four feet long. You have four curtain hooks. At what intervals do you place the curtain hooks?’

My housemistress was a Scot, Jean Stewart, and a place had been found for me under her care because a glamorous-sounding girl named Augusta had of a sudden decided to leave. I was no substitute for this Augusta. Huge, foreign, by now crop-haired, queerly named and in my old school uniform, I was an odd fish.

I learned to love my housemistress, who combined suffering with beauty and reticence. She was a devout Scots Presbyterian, later retiring to the Western Isles and becoming a minister, but I simply could not abide the diamantine, pearly, glorious heroine of a headmistress, the radiant Miss Reader-Harris, later Dame Diana Reader-Harris, who is revered beyond her death to this day. I have no doubt that she was good and that she had star quality of the regal, cinematic sort. She would have made a wonderful-looking wife for a dictator. I am almost certain that she, who wore a large, three-stoned diamond ring, had, poor woman, like so many of our other teachers, lost her fiancé in the war.