On the Mysterious Lake.

All of a sudden I saw tliat the water of the lake, from being clear and transparent, had become white. 1 climbed up the mast, and saw that the water was reddish near the low shore and choked with papyrus plants ; undoubtedly we were near a river. In fact, on bending to the south-west, I perceived the mouth of an embouchure about four thousand feet wide. I gave orders to enter it. We ascended the river for about six miles, and 1 found myself before a large and roaring waterfall.