John McDouall Stuart (1815 - 1864) was one of the greatest explorers of inland Australia IMO.
He led the first successful expedition to cross the Australian mainland from south to north and return, through the centre of the continent. The Stuart highway is named after him
He was tough as nails, fearless and for a man who stood about 5 feet tall had a big heat.
Flinders achieved a lot, but Stuart took on this great but unforgiving continent and survived--although as a broken man!
