They knew Lake Tanganyika well, but had not heard of the Zambesi.

They spoke quite positively, saying that the water of Lake Tanganyika flowed out by the opposite end to that of Nyassa.

As they had seen neither of the overflows, we took it simply as a piece of Arab geography.

We passed their establishment of long sheds next day, and were satisfied that the Arabs must be driving a good trade.
The Lake slave-trade was going on at a terrible rate.

Two enterprising Arabs had built a dhow, and were running her, crowded with slaves, regularly across the Lake.