“We know you very well, Mr Dickens,” he reports the guard replied at once.

“Then, my good fellow,” cried Dickens, almost cheerily (at being recognised at such a time, a petty soul such as Clara Pitt Byrne might have interjected), “for God’s sake give me your key, and send one of those labourers here, and I’ll empty this carriage.”

And then, in Dickens’s letters to his friends, the guards did as they were bid, labourers laying down planks to the carriage, and then the author clambered back into the tilted coach and crawled down its length to retrieve his top hat and his flask of brandy.

I should interrupt our mutual friend’s description here just long enough to say that, using the names listed in the official railway report as my guide, I later tracked down the very guard that Dickens reports stopping and galvanising into such useful action. The guard—a certain Lester Smyth—had a somewhat different recollection of those moments.

“We were trying to get down to ’elp the injured and dying when this toff who’d climbed out of the teetering first-class coach runs up to Paddy Beale and me, all wild-eyed and pale, and keeps shouting at us, ‘Do you know me, man!? Do you know me!? Do you know who I am??’

“I admit that I replied, ‘I don’t care if you’re Prince Albert, mate. Get out of my bleedin’ way.’ It was not the usual way I’d speak to a gentleman, but that wasn’t no usual day.”

At any rate, Dickens did commandeer the work of some labourers to help extricate Ellen and Mrs Ternan, he did crawl back into the carriage to retrieve his flask and top hat, he did fill his top hat with water before clambering down the steep bank, and all witnesses agree that Dickens went immediately to work down among the dying and the dead.

IN HIS FIVE REMAINING YEARS after Staplehurst, Dickens would only say about what he saw in that riverbed—“It was unimaginable”—and of what he heard there—“Unintelligible.” This from the man generally agreed to have the greatest imagination, after Sir Walter Scott, of any English writer. And from a man whose stories were, if nothing else, always eminently intelligible.