Has the mystery of the culprit behind the broken marble table finally been solved?

The finger is being pointed at Joe Hockey.

The former treasurer was apparently the one who hopped onto the Italian marble table in Tony Abbott's prime ministerial suite, on the night Abbott was rolled by Malcolm Turnbull last year, promptly falling straight through it.

If the revelation is true, journalist Niki Savva, who recounts the saga in her new book, has solved one of Canberra's best kept secrets.