All this points to a temporary occupation by a race at a far higher stage of culture than any known Australians, who were certainly never capable of executing even the crude works of art described.
Then who was executing him, killing him, depriving him of life--him, Pierre, with all his memories, aspirations, hopes, and thoughts?
In art the Corybantes appear, usually not more than two or three in number, fully armed and executing their orgiastic dance in the presence of the Great Mother, her lions and Attis.
A still more important expedition was that of Lieutenant Hourst, who, starting from Timbuktu in January 1896, navigated the Niger from that point to its mouth, executing a careful survey of the river and the various obstructions to navigation.
In theory these successive approximations may be carried as far as we please, but in practice the labour of executing each approximation is so great that we are obliged to stop when the solution is so near the truth that the outstanding error is less than that of the best observations.