Campbell Copelin

Daubeney Carshott, a concert pianist, leaves London to dive for pearls on Thursday Island in the South Seas at the whim of Stella Raff, his fiancée. Once there, he discovers that the life he leads as a pearl diver is better in every way than his former existence as a social-lion pianist. He meets and falls in love with Lorna Quidley, after learning this Stella had send other suitors off in quest of a giant pearl for her. (imdb)

Forestry graduate Jim Thornton saves a young woman, Joan Burbridge, from drowning at Palm Beach. He later turns up to work at her adopted father Stephen's timber company. Burbridge is secretly being undermined by his treacherous foreman Darley and competitor Charles Blake. Blake is also engaged to Joan despite sleeping with Darley's sister Claire. Thornton eventually exposes Darley and takes his job, and organises a timber drive.

Alan Richards is the sole survivor of a pearling lugger which has been shipwrecked on Pakema Reef during a typhoon. He sets out to recover some pearls which went missing in the wreck, crossing through the jungle and fighting headhunters.

After being fired from his job at a grocer, George, gets a job as a stableboy at a local stud farm run by the Fleming family. He befriends the horse Hotspur who is a favourite to win the Melbourne Cup, and develops a strong whistle which is used to make the horse run fast.