Joe Carstairs is a boy on a farm in Australia. His father is a keen naturalist who, some years before had set off for New Guinea in search of specimens, and never been heard of again. Joe is old enough to mount a search expedition, and takes with him a local doctor and an aboriginal worker on his farm. They find themselves joined by a stowaway, Jimmy, whose father is a squatter (farmer) nearby, together with his dog, Gyp.This team sets off, arrive in New Guinea, hire some more porters, and travel guided by some sixth sense straight to where Mr...

In California settlers are trying to make a living working as fruit-growers. Problems with blights and insects mean that the crops are failing. A prospector arrives and tells stories of ancient cities where there is a lot of gold. He then dies. Some of the settlers decide to go and search for the gold. They have long distances to travel and meet many challenges along the way. They eventually reach one of these cities and find evidence that it has been abandoned by invaders hundreds or thousands of years ago...

Based around the crew of cutter HMS White Hawk, this is a tale of smuggling in the early 19th century off the coast of Wessex. The midshipman of the cutter is taken hostage by the smugglers and is befriended by a farm-boy, son of one of the smugglers. His friendship is rudely rebuffed, the midshipman eventually escapes and the farm-boy gets his long-held dream of becoming a seaman on an Excise vessel.