WHAT A STRANGE time this has been. Today, on the morning of my seventy-seventh birthday, I decided to make one last visit to the Imperial War Museum library in Lambeth. It suited my peculiar state of mind. The reading room, housed right up in the dome of the building, was formerly the chapel of the Royal Bethlehem Hospital—the old Bedlam. Where the unhinged once came to offer their prayers, scholars now gather to research the collective insanity of war. The car the family was sending was not due until after lunch, so I thought I would distract myself, checking final details, and saying my farewells to the Keeper of Documents, and to the cheerful porters who have been escorting me up and down in the lift during these wintry weeks. I also intended to donate to the archives my dozen long letters from old Mr. Nettle. It was a birthday present to myself, I suppose, to pass an hour or two in a half-pretense of seeming busy, fussing about with those little tasks of housekeeping that come at the end, and are part of the reluctant process of letting go. In the same mood, I was busy in my study yesterday afternoon; now the drafts are in order and dated, the photocopied sources labeled, the borrowed books ready for return, and everything is in the right box file. I’ve always liked to make a tidy finish.

It was too cold and wet, and I was feeling too troubled to go by public transport. I took a taxi from Regent’s Park, and in the long crawl through central London I thought of those sad inmates of Bedlam who were once a source of general entertainment, and I reflected in a self-pitying way on how I was soon to join their ranks. The results of my scan have come through and I went to see my doctor about them yesterday morning. It was not good news. This was the way he put it as soon as I sat down. My headaches, the sensation of tightness around the temples, have a particular and sinister cause. He pointed out some granular smears across a section of the scan. I noticed how the pencil tip quivered in his hand, and I wondered if he too was suffering some neural disorder. In the spirit of shoot the messenger, I rather hoped he was. I was experiencing, he said, a series of tiny, nearly imperceptible strokes. The process will be slow, but my brain, my mind, is closing down. The little failures of memory that dog us all beyond a certain point will become more noticeable, more debilitating, until the time will come when I won’t notice them because I will have lost the ability to comprehend anything at all. The days of the week, the events of the morning, or even ten minutes ago, will be beyond my reach. My phone number, my address, my name and what I did with my life will be gone. In two, three or four years’ time, I will not recognize my remaining oldest friends, and when I wake in the morning, I will not recognize that I am in my own room. And soon I won’t be, because I will need continuous care.

I have vascular dementia, the doctor told me, and there was some comfort to be had. There’s the slowness of the undoing, which he must have mentioned a dozen times. Also, it’s not as bad as Alzheimer’s, with its mood swings and aggression. If I’m lucky, it might turn out to be somewhat benign. I might not be unhappy—just a dim old biddy in a chair, knowing nothing, expecting nothing. I had asked him to be frank, so I could not complain. Now he was hurrying me out. There were twelve people in his waiting room wanting their turn. In summary, as he helped me into my coat, he gave me the route map: loss of memory, short- and long-term, the disappearance of single words—simple nouns might be the first to go—then language itself, along with balance, and soon after, all motor control, and finally the autonomous nervous system. Bon voyage!

I wasn’t distressed, not at first. On the contrary, I was elated and urgently wanted to tell my closest friends. I spent an hour on the phone breaking my news. Perhaps I was already losing my grip. It seemed so momentous. All afternoon I pottered about in my study with my housekeeping chores, and by the time I finished, there were six new box files on the shelves. Stella and John came over in the evening and we ordered in some Chinese food. Between them they drank two bottles of Morgon. I drank green tea. My charming friends were devastated by my description of my future. They’re both in their sixties, old enough to start fooling themselves that seventy-seven is still young. Today, in the taxi, as I crossed London at walking pace in the freezing rain, I thought of little else. I’m going mad, I told myself. Let me not be mad. But I couldn’t really believe it. Perhaps I was nothing more than a victim of modern diagnostics; in another century it would have been said of me that I was old and therefore losing my mind. What else would I expect? I’m only dying then, I’m fading into unknowing.

My taxi was cutting through the back streets of Bloomsbury, past the house where my father lived after his second marriage, and past the basement flat where I lived and worked all through the fifties. Beyond a certain age, a journey across the city becomes uncomfortably reflective. The addresses of the dead pile up. We crossed the square where Leon heroically nursed his wife, and then raised his boisterous children with a devotion that amazed us all. One day I too will prompt a moment’s reflection in the passenger of a passing cab. It’s a popular shortcut, the Inner Circle of Regent’s Park.

We crossed the river at Waterloo Bridge. I sat forward on the edge of my seat to take in my favorite view of the city, and as I turned my neck, downstream to St. Paul’s, upstream to Big Ben, the full panoply of tourist London in between, I felt myself to be physically well and mentally intact, give or take the headaches and a little tiredness. However withered, I still feel myself to be exactly the same person I’ve always been. Hard to explain that to the young. We may look truly reptilian, but we’re not a separate tribe. In the next year or two, however, I will be losing my claim to this familiar protestation. The seriously ill, the deranged, are another race, an inferior race. I won’t let anyone persuade me otherwise.

My cabbie was cursing. Over the river, roadworks were forcing us on a detour toward the old County Hall. As we swung off the roundabout there, toward Lambeth, I had a glimpse of St. Thomas’s Hospital. It took a clobbering in the Blitz—I wasn’t there, thank God—and the replacement buildings and the tower block are a national disgrace. I worked in three hospitals in the duration—Alder Hey and the Royal East Sussex as well as St. Thomas’s—and I merged them in my description to concentrate all my experiences into one place. A convenient distortion, and the least of my offenses against veracity.

It was raining less heavily as the driver made a neat U-turn in the middle of the road to bring us outside the main gates of the museum. With the business of gathering up my bag, finding a twenty-pound note and unfolding my umbrella, I did not notice the car parked immediately in front until my cab pulled away. It was a black Rolls. For a moment I thought it was unattended. In fact, the chauffeur was a diminutive fellow almost lost behind the front wheel. I’m not sure that what I am about to describe really rates as a startling coincidence. I occasionally think of the Marshalls whenever I see a parked Rolls without a driver. It’s become a habit over the years. They often pass through my mind, usually without generating any particular feeling. I’ve grown used to the idea of them. They still appear in the newspapers occasionally, in connection with their Foundation and all its good work for medical research, or the collection they’ve donated to the Tate, or their generous funding of agricultural projects in sub-Saharan Africa. And her parties, and their vigorous libel actions against national newspapers. It was not remarkable that Lord and Lady Marshall passed through my thoughts as I approached those massive twin guns in front of the museum, but it was a shock to see them coming down the steps toward me.

A posse of officials—I recognized the museum’s director—and a single photographer made up a farewell party. Two young men held umbrellas over the Marshalls’ heads as they descended the steps by the columns. I held back, slowing my pace rather than stopping and drawing attention to myself. There was a round of handshakes, and a chorus of genial laughter at something Lord Marshall said. He leaned on a walking stick, the lacquered cane that I think has become something of a trademark. He and his wife and the director posed for the camera, then the Marshalls came away, accompanied by the suited young men with the umbrellas. The museum officials remained on the steps. My concern was to see which way the Marshalls would go so that I could avoid a head-on encounter. They chose to pass the guns on their left, so I did the same.

Concealed partly by the raised barrels and their concrete emplacements, partly by my tilted umbrella, I kept hidden, but still managed a good look. They went by in silence. He was familiar from his photographs. Despite the liver spots and the purplish swags under his eyes, he at last appeared the cruelly handsome plutocrat, though somewhat reduced. Age had shrunk his face and delivered the look he had always fallen short of by a fraction. It was his jaw that had scaled itself down—bone loss had been kind. He was a little doddery and flat-footed, but he walked reasonably well for a man of eighty-eight. One becomes a judge of these things. But his hand was firmly on her arm and the stick was not just for show. It has often been remarked upon, how much good he did in the world. Perhaps he’s spent a lifetime making amends. Or perhaps he just swept onward without a thought, to live the life that was always his.

As for Lola—my high-living, chain-smoking cousin—here she was, still as lean and fit as a racing dog, and still faithful. Who would have dreamed it? This, as they used to say, was the side on which her bread was buttered. That may sound sour, but it went through my mind as I glanced across at her. She wore a sable coat and a scarlet wide-brimmed fedora. Bold rather than vulgar. Near on eighty years old, and still wearing high heels. They clicked on the pavement with the sound of a younger woman’s stride. There was no sign of a cigarette. In fact, there was an air of the health farm about her, and an indoor tan. She was taller than her husband now, and there was no doubting her vigor. But there was also something comic about her—or was I clutching at straws? She was heavy on the makeup, quite garish around the mouth and liberal with the smoothing cream and powder. I’ve always been a puritan in this, so I count myself an unreliable witness. I thought there was a touch of the stage villain here—the gaunt figure, the black coat, the lurid lips. A cigarette holder, a lapdog tucked under one arm and she could have been Cruella De Vil.

We passed by each other in a matter of seconds. I went on up the steps, then stopped under the pediment, out of the rain, to watch the group make its way to the car. He was helped in first, and I saw then how frail he was. He couldn’t bend at the waist, nor could he take his own weight on one foot. They had to lift him into his seat. The far door was held open for Lady Lola who folded herself in with a terrible agility. I watched the Rolls pull away into the traffic, then I went in. Seeing them laid something heavy on my heart, and I was trying not to think about it, or feel it now. I already had enough to deal with today. But Lola’s health was on my mind as I gave my bag in at the cloakroom, and exchanged cheery good mornings with the porters. The rule here is that one must be escorted up to the reading room in a lift, whose cramped space makes small talk compulsory as far as I’m concerned. As I made it—shocking weather, but improvements were due by the weekend—I couldn’t resist thinking about my encounter outside in the fundamental terms of health: I might outlive Paul Marshall, but Lola would certainly outlive me. The consequences of this are clear. The issue has been with us for years. As my editor put it once, publication equals litigation. But I could hardly face that now. There was already enough that I didn’t want to be thinking about. I had come here to be busy.

I spent a while chatting with the Keeper of Documents. I handed over the bundle of letters Mr. Nettle wrote me about Dunkirk—most gratefully received. They’ll be stored with all the others I’ve given. The Keeper had found me an obliging old colonel of the Buffs, something of an amateur historian himself, who had read the relevant pages of my typescript and faxed through his suggestions. His notes were handed to me now—irascible, helpful. I was completely absorbed by them, thank God.

“Absolutely no [underlined twice] soldier serving with the British army would say ‘On the double.’ Only an American would give such an order. The correct term is ‘At the double.’”

I love these little things, this pointillist approach to verisimilitude, the correction of detail that cumulatively gives such satisfaction.

“No one would ever think of saying ‘twenty-five-pound guns.’ The term was either ‘twenty-five pounders’ or ‘twenty-five-pounder guns.’ Your usage would sound distinctly bizarre, even to a man who was not with the Royal Artillery.”

Like policemen in a search team, we go on hands and knees and crawl our way toward the truth.

“You have your RAF chappie wearing a beret. I really don’t think so. Outside the Tank Corps, even the army didn’t have them in 1940. I think you’d better give the man a forage cap.”

Finally, the colonel, who began his letter by addressing me as “Miss Tallis,” allowed some impatience with my sex to show through. What was our kind doing anyway, meddling in these affairs?

“Madame [underlined three times]—a Stuka does not carry ‘a single thousand-ton bomb.’ Are you aware that a navy frigate hardly weighs that much? I suggest you look into the matter further.”

Merely a typo. I meant to type “pound.” I made a note of these corrections, and wrote a letter of thanks to the colonel. I paid for some photocopies of documents which I arranged into orderly piles for my own archives. I returned the books I had been using to the front desk, and threw away various scraps of paper. The work space was cleared of all traces of me. As I said my goodbyes to the Keeper, I learned that the Marshall Foundation was about to make a grant to the museum. After a round of handshaking with the other librarians, and my promise to acknowledge the department’s help, a porter was called to see me down. Very kindly, the girl in the cloakroom called a taxi, and one of the younger members of the door staff carried my bag all the way out to the pavement.

During the ride back north, I thought about the colonel’s letter, or rather, about my own pleasure in these trivial alterations. If I really cared so much about facts, I should have written a different kind of book. But my work was done. There would be no further drafts. These were the thoughts I had as we entered the old tram tunnel under the Aldwych, just before I fell asleep. When I was woken by the driver, the cab was outside my flat in Regent’s Park.

I filed away the papers I had brought from the library, made a sandwich, then packed an overnight case. I was conscious as I moved about my flat, from one familiar room to another, that the years of my independence could soon be over. On my desk was a framed photograph of my husband, Thierry, taken in Marseille two years before he died. One day I would be asking who he was. I soothed myself by spending time choosing a dress to wear for my birthday dinner. The process was actually rejuvenating. I’m thinner than I was a year ago. As I trailed my fingers along the racks I forgot about the diagnosis for minutes on end. I decided on a shirtwaisted cashmere dress in dove gray. Everything followed easily then: a white satin scarf held by Emily’s cameo brooch, patent court shoes—low-heeled, of course—a black dévoré shawl. I closed the case and was surprised by how light it seemed as I carried it into the hallway.

My secretary would be coming in tomorrow, before I returned. I left her a note, setting out the work I wanted her to do, then I took a book and a cup of tea and sat in an armchair at a window with a view over the park. I’ve always been good at not thinking about the things that are really troubling me. But I was not able to read. I felt excited. A journey into the country, a dinner in my honor, a renewal of family bonds. And yet I’d had one of those classic conversations with a doctor. I should have been depressed. Was it possible that I was, in the modern term, in denial? Thinking this changed nothing. The car was not due for another half hour and I was restless. I got out of the chair, and went up and down the room a few times. My knees hurt if I sit too long. I was haunted by the thought of Lola, the severity of that gaunt old painted face, her boldness of stride in the perilous high heels, her vitality, ducking into the Rolls. Was I competing with her as I trod the carpet between the fireplace and the Chesterfield? I always thought the high life, the cigarettes, would see her off. Even in our fifties I thought that. But at eighty she has a voracious, knowing look. She was always the superior older girl, one step ahead of me. But in that final important matter, I will be ahead of her, while she’ll live on to be a hundred. I will not be able to publish in my lifetime.

The Rolls must have turned my head, because the car when it came—fifteen minutes late—was a disappointment. Such things do not usually trouble me. It was a dusty minicab, whose rear seat was covered in nylon fur with a zebra pattern. But the driver, Michael, was a cheerful West Indian lad who took my case and made a fuss of sliding the front passenger seat forward for me. Once it was established that I would not tolerate the thumping music at any volume from the speakers on the ledge behind my head, and he had recovered from a little sulkiness, we got along well and talked about families. He had never known his father, and his mother was a doctor at the Middlesex Hospital. He himself graduated in law from Leicester University, and now he was going to the LSE to write a doctoral thesis on law and poverty in the third world. As we headed out of London by the dismal Westway, he gave me his condensed version: no property law, therefore no capital, therefore no wealth.

“There’s a lawyer talking,” I said. “Drumming up business for yourself.”

He laughed politely, though he must have thought me profoundly stupid. It is quite impossible these days to assume anything about people’s educational level from the way they talk or dress or from their taste in music. Safest to treat everyone you meet as a distinguished intellectual.

After twenty minutes we had spoken enough, and as the car reached a motorway and the engine settled into an unvarying drone, I fell asleep again and when I woke we were on a country road, and a painful tightness was around my forehead. I took from my handbag three aspirins which I chewed and swallowed with distaste. Which port............