The navigation up to the mouth of the Sobat is at all times easy, the Abu Zeid Ford and occasional rocks and sandbanks forming the only difficulties. The deepest channels lie usually towards the east bank. From the Sobat to Gondokoro a perfect and recent knowledge of the route is required, in order not to deviate into any of the lateral branches which are frequently met with, and which, varying from year to year, are chiefly in evidence during and after the rainy season. There are also many sandbanks on this stretch. Between Gondokoro and Rejaf the river is rather difficult when low on account of shifting sandbanks and islands. There are a few rocks, but not dangerous, except at one point. Between Rejaf and Bedden there is the same difficulty of shifting sandbanks and sunken rocks, which are, however, isolated and few in number, and might be blasted away. The current here is about 1½ miles an hour. At Bedden there is a bad rapid necessitating a transhipment; but from there boats can go to Kiri. From Kiri to Labore there are awkward rapids, but the river might be utilised to a great extent. The river continues of much the same character till the junction of the Asua, when the rapids become more serious, terminating in the Fola Rapids. The last 15 miles before reaching Nimule are quite impassable to any steamers or boats. From here on, the river is free of any obstacles up to Lake Albert. Between Dufile and Lake Albert the Nile is very sluggish, and papyrus islands abound in it. Breadth of channel varies. BOATS AND STEAMERS. The usual Nile boats are the “Nugger” and “Gayassa,” varying in capacity from 5 to 400 ardebs. The latter solidly built, with high bows, and free board, and lateen-rigged, is the Egyptian boat, whilst the former, which is found from the 2nd cataract southward, is flat, with low free board, and is roughly though solidly built without ribs. Rafts, canoes, inflated waterskins and water-tight pots are also used for individual navigation. Further up stream “dugouts” and ambach canoes are seen. Of steamers there are 10 gunboats, 21 other steamers, and 6 launches on the river, mostly stern-wheel; a few are screw, and one or two paddle. (_Vide_ Chap. X, Part I.) LANDING PLACES. From Halfa to Khartoum and from Khartoum up to Goz Abu Guma it is possible to land almost anywhere on either bank. From there up to Kodok, owing to the broad reed fringe on either bank, landing is difficult except at the following places, viz.:—Jebelein, Um Ashrin, Karshawal, Renk, Meshra Leungtom or Domaia, Meshra Zeraf, Meshra Rom, Kaka, Kaka Wood Station, Melut and Demtemma. All these, except Kaka and Um Ashrin, are on the right bank.