Kennedy explored the northern tributaries of the Darling, and a river in S.
In the north of the department; the Oise, traversing the northwest, with its tributaries the Serre and the Aisne, the latter of which joins it beyond the limits of the department; and the Marne and the Ourcq in the south.
Below Kuhsan it receives fresh tributaries from the west.
Returning to the south of the Po, the tributaries of that river on its right bank below the Tanaro are very inferior in volume and importance to those from the north.
The network of streams forming the tributaries of the Darling and Murray system give an idea of a well-watered country.