Let us for a moment review the impressions we have gained. The volume of water brought by the Gazelle to swell the Nile is still an unsolved problem. In the contention as to which stream is entitled to rank as first-born among the children of the great river god, the Bahr-el-Ghazal has apparently a claim in every way as valid as the Bahr-el-Gebel. In truth, it would appear to stand in the same relation to the Bahr-el-Gebel as the White Nile does to the Blue. At the season when the waters are highest, the inundations of the Gazelle spread over a very wide territory; about March, the time of year when they are lowest, the river settles down, in its upper section, into a number of vast pools of nearly stagnant water, whilst its lower portion runs off into divers narrow and sluggish channels. These channels, overgrown as they look with massy vegetation, conceal beneath (either in their open depth, or mingled with the unfathomable abyss of mud) such volumes of water as defy our reckoning. The Gazelle then it is which gives to the White Nile a sufficient impetus to roll its waters onward; subsequently the Bahr-el-Gebel finds its way and contributes a more powerful element to the progress of the stream. It must all along be borne in mind that there are besides two other streams, the Dyoor and the Bahr-el-Arab, each of them more important than any tributary of the Bahr-el-Gebel; and these bring in their own influence. To estimate aright the true relation of all these various tributaries is ever opening up the old question in a new light. [Sidenote: THE KYT.]