School Ship Tobermory 3: Race to Kangaroo Cliff

The thrid adventure in the well-loved School Ship Tobermory series. The crew of the School Ship Tobermory head to Australia to take part in a tall ships race, but after dropping out to rescue a local boy their ship runs aground. When Henry, the ship's dog, disappears, the crew set out to find him - but find their trail leading further and further into the Outback. Who are the mysterious couple claiming to be flying doctors, and why are they so interested in an old abandoned mine?