He was fascinated by the idea of a closed society like a town afloat, even if the passengers were only on board for a week or so. He was researching his book at the right time, partly because many of the survivors were still alive and had fresh memories of events more than forty years before. Perhaps they were far enough from the disaster to get over any survivor’s guilt, or the traumas of the night in question.

But Lord did not make use of one new invention which a modern researcher would regard as essential: the tape recorder. Nor did he take notes during the interviews, for fear of intimidating the witnesses. Instead, he prepared his questions for each interview very carefully, and memorized what was said, writing them down afterwards as soon as he found privacy.

The book was also published at exactly the right time. The television age was just beginning, but the public was already used to the immediacy of newsreel and radio reporting, and the highlighting of individual stories in the midst of historic events. Despite the reactions of some traditional historians, history was no longer about kings, queens and presidents but about how it was shaped by people of both high and low status.

Like most history books, A Night to Remember is about the time in which it was written as well as the period it describes. America in the 1950s was more prosperous than it had ever been, and it felt a great moral superiority after defeating the Nazis and taking on the Soviets in the Cold War. As Lord is careful to point out, it was far more classless than the society of 1912. Yet it too had a huge threat hanging over it, as the Soviets built up an increasingly terrifying nuclear arsenal, with thermonuclear bombs and ballistic missiles. Britain was no less threatened by the bomb, and its people had far less space to hide from it. It was about to face its own sinking moment, when the Suez Crisis of 1956 signalled the end of the British Empire.