At the beginning of May, it seemed that a great mystery had been solved.
An Australian academic and entrepreneur, Craig Wright, identified himself as Satoshi Nakamoto, the creator of the crypto-currency Bitcoin.
But, over the following days, the proof he offered was torn apart, not just by angry people on the Bitcoin forums but by a number of authorities on cryptography.
After first promising more evidence, Dr Wright then wrote a blog saying he did not have the strength to continue and retired from public view.
Nakamoto's true identity appeared as opaque as ever - the Australian had not proved his case, but nor had it been disproved.
Now, though, we have a whole new collection of evidence, in the form of a 35,000-word article about the Nakamoto affair in the London Review of Books.
The author is the journalist and novelist Andrew O'Hagan, whose work includes a fascinating and hilarious account of his time trying to be the ghost writer of Julian Assange's autobiography.
It seems Mr O'Hagan has an appetite for driven and difficult high-performing geeky types, because he spent six months with Craig Wright.
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