Ludwig Leichhardt — A famed explorer who walked into silence

In the autumn of 1848 the Prussian-born naturalist Ludwig Leichhardt led a party of seven men out of the Darling Downs of eastern Australia, intending to cross the continent from the Condamine River in Queensland to the Swan River on the far west coast — a traverse of perhaps 5,000 to 6,000 kilometres through country no European had seen. The party was last sighted on 3 April 1848 at Allan Macpherson’s Cogoon station, near present-day Roma. Leichhardt, his four European companions, his two Aboriginal guides, and his herd of livestock then rode west and were never reliably seen again. No bodies, no graves, no camp with human remains, and no confirmed relic of the men themselves has ever been found. The disappearance is the most enduring unsolved case in the history of Australian exploration.

Leichhardt was not a novice. His first expedition of 1844–45 had carried him and his companions nearly 4,800 kilometres overland from Jimbour, on the Darling Downs, to the British outpost at Port Essington on the northern coast, arriving on 17 December 1845 after the party had long been given up for dead. That journey made him a celebrity in Sydney and across the colonies. A second attempt, begun in December 1846, was a failure: heavy rain, malarial fever and near-famine forced the party back after roughly 800 kilometres and some five months. The 1848 expedition was his third venture and his most ambitious — and the one from which no member returned to tell what happened.

The party comprised Leichhardt himself; four Europeans — Adolph Classen, Arthur Hentig, Donald Stuart and Thomas Hands; and two Aboriginal guides from the Port Stephens district, Wommai and Billy Bombat, whose knowledge of country and skill in finding water and game would have been the expedition’s most valuable asset. They drove seven horses, twenty mules and fifty bullocks, a herd intended to feed the men over a journey of many months. Their fate is unknown. The most plausible reconstructions, drawn from scattered marked trees and a single authenticated relic, hold that the party penetrated deep into the continent — possibly as far as the desert country near the Western Australian border — before perishing of thirst, starvation, flood, disease or conflict, in some combination the record cannot resolve.

Because nothing was witnessed and nothing recovered, this is a dossier about an absence. What can be stated with confidence is narrow: the route attempted, the men who attempted it, the date they were last seen, and the long failure of every search to find them.