The Roah is a river of about the same size as the Tondy, with which it finally unites itself; it here makes a remarkable bend from south-east to north-east, but its general direction for some distance in this district is due north; the stream flowed between banks twenty or thirty feet in height; its average width was full forty feet, whilst it was only three feet deep; the velocity of the current was one hundred and twenty feet a minute. The grass flat covered by the Roah at the time of its inundation is not so wide as that covered by the Tondy at Koolongo; it measured barely half a league across, and I therefore conclude that this river carries northward a volume of water smaller than the Tondy. The Bongo were most assiduous in securing the large supplies of fish offered by the Roah. Across the stream in many places was thrown a kind of weir like a _chevaux de frise_; this they stopped up with bunches of grass and so formed a small dam; over the open places were set creels, and altogether a rich produce rarely failed to be obtained. Some miles up the river, where the banks are shut in by impenetrable reeds, is a favourite resort of hippopotamuses, and it was said that, two years previously, the natives had killed no less than thirty in a single day. The brutes had been driven by the low condition of the water to seek the deeper basins of the river-bed, whence all escape was impossible. We remained in Dokkuttoo for two days, of which I made the most by excursions in the neighbourhood. A small slave caravan, containing one hundred and fifty girls and children, happened to be passing through the Seriba; it was conducted by traders coming from Ghattas’s and Agahd’s territory in the east. The whole party huddled together for the night in a couple of huts, several old female slaves being entrusted with the supervision of the children. I was a witness of the arrangements for the evening meal, and, contrary to my expectation, found that everything was conducted with much system and regularity. The old Bongo people of the neighbouring villages had brought fifty bowls of dokhn-groats, and as many more containing sauces prepared from sesame-oil, Hyptis-pap, and dried and powdered meat or fish, and other comestibles of gourds and wild Melochia. [Sidenote: FORCED PROVISIONS.]