There were the passengers in second class, too, professionals and their wives, and salesmen with samples of wares or order books at the ready, all set to make a deal with the entrepreneurs of the New World. And there was the crew, the boilermen and deckhands, the stewards and stewardesses, and, of course, the officers, who would find themselves at the centre of the drama of the ship’s final hours. And as they headed for destruction, so did the larger world they represented, which would soon hit its own iceberg in the shape of the First World War.

Walter Lord begins his account of the disaster with a curious fact: in 1898 one Morgan Robertson wrote a novel about a fabulous liner, packed with the rich and fashionable folk of the day, which crashed into an iceberg and sank. The book was called Futility and the events predicted in it would become startlingly true. It seems to have been the discovery of this eerie coincidence that inspired Lord to take on the mantle of Chief Chronicler of the Titanic.

He would have many imitators, but what continues to mark his version apart from the rest is its extraordinary economy. He manages to convey both the detail and the sweep, the little sorrows and the all-embracing horror, in prose which is minutely researched but never dense. His style is serious, moving and, above all, readable. In my own investigation into the truth behind the sinking, I never came across another book to rival it.

The Titanic has spawned its own legends, its own heroes and heroines, but, as so often in life, the truth is a little more complicated. Some of these stars, the famously ‘unsinkable’ Molly Brown, for instance, or John Hart the third-class steward, or the stalwart Countess of Rothes, prove satisfactorily authentic when they are researched. Mrs Brown did indeed take the oars and try to get the lifeboats to go back for survivors; John Hart did lead parties up from steerage to the boat deck on his own initiative and he did get them away to safety; Lady Rothes did take over the tiller, and corresponded with the sailor in charge of her boat for the rest of their lives.