The Tzo divides into the Tamunak'le and Mababe; the Tamunak'le discharges itself into the Zouga, and the Teoughe into the lake.

The flow begins either in March or April, and the descending waters find the channels of all these rivers dried out, except in certain pools in their beds, which have long dry spaces between them.
The lake itself is very low.

The Zouga is but a prolongation of the Tamunak'le, and an arm of the lake reaches up to the point where the one ends and the other begins.

The last is narrow and shallow, while the Zouga is broad and deep.

The narrow arm of the lake, which on the map looks like a continuation of the Zouga, has never been observed to flow either way.