Kennedy explored the northern tributaries of the Darling, and a river in S.
Its chief tributaries on this last portion of its course are the Alz and the Salzach, and at Passau, 309 m.
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.
Several large tributaries: - on the right, the Berezina, connected with the W.