The greater Lake lies in a comparatively narrow trough, with highland on each side, which is always visible; but when we look at Moero, to the south of the mountains of Rua on the west, we have nothing but an apparently boundless sea horizon.

The Luapula and Rovukwe form a marsh at the southern extremity, and Casembe dissuaded me from entering it, but sent a man to guide me to different points of Moero further down.

From the heights at which the southern portions were seen, it must be from forty to sixty miles broad.
From the south end of the mountains of Rua (9 deg.

4' south lat.) it is thirty-three miles broad.

No native ever attempts to cross it even there.