Most of the mills are situated on the banks of the watercourses in the neighbourhood of the town.
It is easy to distinguish the great primitive watercourses from the lateral ducts which they fed, the latter being almost without banks and merely traceable by the winding curves of the layers of alluvium in the bed, while the former are hedged in by high banks of mud, heaped up during centuries of dredging.
There are no bridges, except where watercourses occur.
The reckless destruction of forests along the watercourses also adds to the barren aspect of the country.
The broad watercourses 1 On the alteration of streets alone $26,691,496 were expended from 1822 to 1880.