He did, apparently. ‘That girlfriend of the guy who had the villa. The neurotic American with the pale hair. What was her name? Alice? Alix? She kept complaining about her throat, the whole time we were there.’

‘You have wonderfully perfect recall.’

‘I’ve had a lot of time to think.’

The image of that sun whitened villa in Estoril, banished from my conscious mind for nearly four decades, suddenly filled my mind. The hot, blond beach below the terrace, drunken dinners resonating with sex and subtext, climbing the hill to the haunted castle at Cintra, swimming in the whispering, blue waters, waiting in the great square before Lisbon Cathedral to walk past the body of Salazar… The whole experience sprang back into vivid, technicoloured life, one of those holidays that bridge the gap between adolescence and maturity, with all the attendant dangers of that journey, where you come home quite different from when you set out. A holiday, in fact, that changed my life. I nodded. ‘Yes. Well, you would have done.’

‘Of course, if that were the reason, then I could have had a child before.’

Despite his seriousness I couldn’t match it. ‘Even you wouldn’t have had much time. We were only twenty-one. These days every girl on a housing estate may be pregnant by the time she’s thirteen, but it was different then.’ I smiled reassuringly, but he wasn’t watching. Instead, he was busy opening a drawer in a handsome bureau plat beneath the Lawrence. He took out an envelope and gave it to me. It wasn’t new. I could just make out the postmark. It looked like ‘Chelsea. 23rd December 1990.’