The interior was altogether less discreet. High ceilings and broad staircases suggested a larger and grander residence than it actually was. Dudley Paxton had loaded its conventional comforts with assorted ethnographia collected during his African postings. His son assured me most of it was now mouldering in a museum basement in Bayonne, but plenty of ivory, beaten copper and bolt-eyed statuary remained, along with leopard-skin antimacassars and elephant-foot wastepaper bins.

What Louise had made of this gruesome clutter I couldn’t begin to conjecture. She’d evidently thought better of trying to impose her personality on the villa, however, contenting herself with converting just a couple of rooms to her vision of what it should have been. An airy pale-curtained boudoir with its own south-facing balcony. And a gallery at the back of the house devoted to a dozen or so Expressionist paintings. Not the best, of course. They’d always stayed in England. Latterly in a bank vault, Sir Keith told me. There were a couple of Ensors in the vault. And a Rouault, Louise had always believed, though it still awaited accreditation. The pictures left at L’Hivernance were strictly second division. Which was where the critical establishment had placed Oscar Bantock. So it was no surprise to find him represented by a pair of vividly tempestuous works. The Drowning Clown and Face at the Window. With an empty patch of wall between them where Black Widow may have been destined to hang. But about that Sir Keith was saying nothing.

Staying at the villa focused my mind on Sarah’s all too plausible theory of what had happened there in July 1990. I couldn’t ask whether it was true, of course. Bella and I had struck an unspoken bargain when I accepted her invitation. Her side of it was to avoid cross-questioning me about the Viburna fiasco. Mine was to play the part of a cultured but reticent relative whose presence reassured her new friends that her background in England wasn’t a discreditable blank. Hence, I assumed, the hectic round of dinner parties she arranged while I was with them. And hence the embargo on any expressions of curiosity by me about the first Lady Paxton-and the circumstances of her last departure from L’Hivernance.

But that didn’t stop me thinking. Or imagining. Slammed doors and raised voices echoing through the sea-lit rooms. Louise standing on the beach at sunrise, slipping a ring from her finger and hurling it towards the cream-topped breakers. Or sitting on the boudoir balcony, writing a farewell note to her absent husband. By the time you read this, Keith… I looked at him often when he didn’t realize he was being observed and wondered just what her message had been. If Sarah was right, you couldn’t blame him for destroying it. It made no difference, after all. Nothing could bring Louise back to life. Certainly not the missing jigsaw-pieces of the truth about how she’d died. Even if I found them, I could never find her. She was gone for ever. Though sometimes-when a curtain moved or a silence fell-you could believe she wasn’t quite out of reach.

My fortnight in Biarritz was half done when Rowena telephoned her father with news that clearly took him aback. She’d got engaged and wanted to come out straightaway to introduce him and Bella to her fiancé. His name was Paul, as I could have predicted. Not a student, apparently, but a risk analyst for Metropolitan Mutual, an insurance company with headquarters in Bristol. In a separate call, Sarah explained that Rowena had met him through her. She and Paul Bryant had been a year apart at King’s College, Cambridge. He’d looked her up on realizing they were both living in Bristol and had instantly fallen for Rowena. As she had for him. Sarah reckoned Sir Keith couldn’t fail to like him.

She was spot on. Rowena and Paul arrived a few days later and were hardly through the door before their compatibility and affection for each other-as well as Paul’s suitability as a son-in-law-became abundantly obvious. He was a young man of charm, humour and evident sincerity. Dark-haired and handsome in a fashion-poster style that clearly appealed to Bella every bit as much as Rowena, he also possessed a keen and probing intellect. Along with a disarming facility for drawing people out about their achievements and ambitions while saying remarkably little about his own. I couldn’t decide whether this was a deliberate technique or a personality trait. Nor whether it was as apparent to others as it was to me. But, strangely, it didn’t make him any less likeable. Quite the reverse. Especially where women were concerned. He was, according to Bella, “the least vain good-looking man I’ve ever met.” Which, coming from her, was quite a compliment. Though where it left me I didn’t like to speculate.

Something else about Paul Bryant puzzled me from the first. His amiability-his lack of the slightest hint of sarcasm-was as intriguing as it was endearing. There was either more or less to him than met the eye. But which? His manner deflected any attempt to decide. He could be naïve as well as profound, gauche as well as sensitive. He could be, it sometimes seemed, anything he judged you wanted him to be.

But his love for Rowena was genuine beyond doubt. To watch him watching her was to glimpse true devotion. And it was devotion that never threatened to smother. He knew how much support to give her and how much independence. He protected her without dominating her. He encouraged her to bloom and stepped back to study the result. He was the best friend she could hope to have. And would make the perfect husband. As she well knew. “Meeting Paul was like recovering from colour blindness,” she told me. “He’s banished the drabness from my life. Not the sadness. Not all of it, anyway. Not yet. But soon he will. With Paul I can lead a happier life than I ever expected to.”

There was never any likelihood that Sir Keith would object to the match. Since Paul worked in Bristol and already owned a home there, marriage needn’t disrupt Rowena’s studies in any way. When she revealed they’d been thinking of a September wedding, her father was almost more enthusiastic than she was. “Yes, make it September,” he urged. “It’ll be more than a wedding. It’ll be the day this family puts the past behind it and goes forward together.” Fine words. Fine sentiments. With every prospect of fulfilment.

While I was in Biarritz, there was only one occasion when I talked to Paul on his own. It was the day before I was due to leave. Sir Keith was at the golf course, while Bella had taken Rowena to experience the delights of thalasso-therapy, the latest beauty treatment with which she hoped to stave off middle age. We’d agreed to meet them afterwards for tea. Leaving the villa with plenty of time to spare, we strolled down the beaches-emptied by grey skies and a keen wind-to the old fishing port, then climbed by zig-zag paths up through the tamarisk trees to the Pointe Atalaye. At its summit, we leant against some railings and looked back along the sweep of the bay to the lighthouse and the nestling roof of L’Hivernance. And Paul suddenly answered a question I’d not had the courage to ask.

“I know about the suicide attempt, Robin. You don’t have to avoid the subject for my benefit.”

“Good. I’m glad. That you know, I mean.”

“She told me right at the start. She’s still not ready to tell her father, but… we’ll get there in the end.”

“I’m sure you will. You seem to be just what she needs.”

“Glad you think so. It makes it easier for me to mention something that’s been on my mind.”

“Oh yes?”

“Well, Sarah and Rowena have both told me how kind you’ve been to them since their mother’s death. How generous with your time and attention.” It was a curious choice of phrase. He kept his eyes trained on the distant lighthouse as he continued. “Sarah and I saw quite a lot of one another at Cambridge. I feel I know her almost as well as Rowena. I even met their mother once. And the infamous Oscar Bantock.”