Mark Twain at Manly

I have seen it stated that the author Mark Twain visited Manly, in company with J F Archibald, editor of the Bulletin, and did a spot of rock fishing. An embellishment of the story says that for a joke Archibald arranged for someone hidden on the rocks below to attach a snapper to Twain’s line, unseen by him. A further embellishment suggests that the prankster in question was none other than the author Henry Lawson. I would like to have a printed source of reference for this anecdote, to know if there is a grain of truth in it. Presumably the event took place during one of Twain’s two brief stays in Sydney in September and December 1895, when he was engaged on a long trip around the world, accompanied by his wife and daughter. The Sydney Morning Herald for September 1895 gives good details of the speeches Twain made in Sydney, at the School of Arts and the Protestant Hall, but is not otherwise revealing about his movements while in Sydney. Can anyone throw light on the incident?

The 1890s photograph above, originally published in Rudd's New Views of Sydney and Vicinity, shows rocks at Delwood Beach, with Delwood House and at extreme right, Manly Wharf.