Australians have been keen surfers since the legendary Hawaiian board rider Duke Kahanamoku demonstrated his skills at Sydney's northern beaches.
But now an author and film-maker is claiming that Aborigines in that area were surfing long before the sport caught on with Europeans.
John Ogden's claim is somewhat contentious, since he bases it on contemporary reports of indigenous Australians diving into the surf, bodysurfing and fishing from canoes he says were similar to modern surf skis - but not standing up on boards.
In a book about the surf culture of the northern beaches, Saltwater People of the Broken Bays, Ogden quotes Europeans such as William Govett, a surveyor, who lost his line while fishing for snapper at Newport Reef in the 1830s.
To Govett's astonishment, an Aborigine from whom he had borrowed the line "stood upon the verge of a rock ... plunged through a rising wave and disappeared", then after a whole minute under water emerged with the hook and line and rode a "heaving surge" back to the rock.