Nero meanwhile availed himself of his country's desolation, and erected a mansion in which the jewels and gold, long familiar objects, quite vulgarised by our extravagance, were not so marvellous as the fields and lakes, with woods on one side to resemble a wilderness, and, on the other, open spaces and extensive views. The directors and contrivers of the work were Severus and Celer, who had the genius and the audacity to attempt by art even what nature had refused, and to fool away an emperor's resources. They had actually undertaken to sink a navigable canal from the lake Avernus to the mouths of the Tiber along a barren shore or through the face of hills, where one meets with no moisture which could supply water, except the Pomptine marshes. The rest of the country is broken rock and perfectly dry. Even if it could be cut through, the labour would be intolerable, and there would be no adequate result. Nero, however, with his love of the impossible, endeavoured to dig through the nearest hills to Avernus, and there still remain the traces of his disappointed hope.