feet (9 m) in breadth.

This great work, which was attributed to Heracles, had become useless in the time of Pausanias, and the river had resumed its ancient and irregular course; but traces of the canal of Heracles are still visible, and one bank of it was a conspicuous object in the valley when it was visited by William Martin Leake in 1806. The canal of Heracles, however, could not protect the valley from