His last letter is dated the 3rd of April, 1848, from McPherson's station on the Cogoon, but in it he speaks only of the country he has passed through, and nothing of his intended route.
Since the residents of this then outlying station lost sight of him, no sure clue as to the fate of him and his companions has ever come to light.

The total evanishment, not alone of the men, but of the animals -- especially the mules and the goats -- is one of the strangest mysteries of our mysterious interior.

Thirst probably caused the death of the animals, and in that case they would have died singly and apart, and their remains would in after years elude attention.

A similar fate probably befel the men.
Rumour has always been rife as to the locality of Leichhardt's death, and suggestions the most hopelessly unlikely and inconsistent have been put forward and seriously considered.

At the same time, the only two reliable marks, undoubtedly genuine and fitting in in every way with Leichhardt's projected course of travel, have been neglected.
Leichhardt started from McPherson's station on the Cogoon, now perhaps better known as Muckadilla Creek.