The plot is based on the 1880 disappearance of the geologist Lamont Young near Mystery Bay, New South Wales.

[2] The action of the novel takes place at Bermagui, New South Wales; where the reef extends from Montague Island.

He unravels the mystery in his usual efficient fashion and gives Mr Upfield an opportunity to provide a novel and realistic background.

"[6] K. A. in The Argus noted: "Mr Upfield has the knack of telling a detective tale and we salute him again for showing us how to introduce a true Australian atmosphere in a way that enhances his reputation.

"[7] In The Bulletin the reviewer concluded that "the descriptive passages, especially those relating to the catching of swordfish, are very well done, and in bringing Bonaparte from his usual haunts in the interior of the continent to its seashore Upfield has produced a book worth reading for its freshness and vigor.