On passing the Shire we observed great quantities of the plant Alfacinya, already mentioned, floating down into the Zambesi. It is probably the 'Pistia stratiotes', a gigantic "duck-weed". It was mixed with quantities of another aquatic plant, which the Barotse named "Njefu", containing in the petiole of the leaf a pleasant-tasted nut. This was so esteemed by Sebituane that he made it part of his tribute from the subjected tribes. Dr. Hooker kindly informs me that the njefu "is probably a species of 'Trapa', the nuts of which are eaten in the south of Europe and in India. Government derives a large revenue from them in Kashmir, amounting to 12,000 Pounds per annum for 128,000 ass-loads! The ancient Thracians are said to have eaten them largely. In the south of France they are called water-chestnuts." The existence of these plants in such abundance in the Shire may show that it flows from large collections of still water. We found them growing in all the still branches and lagoons of the Leeambye in the far north, and there also we met a beautiful little floating plant, the 'Azolla Nilotica', which is found in the upper Nile. They are seldom seen in flowing streams.
A few miles beyond the Shire we left the hills entirely, and sailed between extensive flats. The banks seen in the distance are covered with trees. We slept on a large inhabited island, and then came to the entrance of the River Mutu (latitude 18d 3' 37" S., longitude 35d 46' E.): the point of departure is called Mazaro, or "mouth of the Mutu". The people who live on the north are called Baroro, and their country Bororo. The whole of the right bank is in subjection to the Landeens, who, it was imagined, would levy a tribute upon us, for this they are accustomed to do to passengers. I regret that we did not meet them, for, though they are named Caffres, I am not sure whether they are of the Zulu family or of the Mashona. I should have liked to form their acquaintance, and to learn what they really think of white men. I understood from Sekwebu, and from one of Changamera's people who lives at Linyanti, and was present at the attack on Senna, that they consider the whites as a conquered tribe.
The Zambesi at Mazaro is a magnificent river, more than half a mile wide, and without islands. The opposite bank is covered with forests of fine timber; but the delta which begins here is only an immense flat, covered with high, coarse grass and reeds, with here and there a few mango and cocoanut trees. This was the point which was reached by the late lamented Captain Parker, who fell at the Sulina mouth of the Danube. I had a strong desire to follow the Zambesi farther, and ascertain where this enormous body of water found its way into the sea; but on hearing from the Portuguese that he had ascended to this point, and had been highly pleased with the capabilities of the river, I felt sure that his valuable opinion must be in possession of the Admiralty. On my arrival in England I applied to Captain Washington, Hydrographer to the Admiralty, and he promptly furnished the document for publication by the Royal Geographical Society.
The river between Mazaro and the sea must therefore be judged of from the testimony of one more competent to decide on its merits than a mere landsman like myself.
'On the Quilimane and Zambesi Rivers'. From the Journal of the late Capt. HYDE PARKER, R.N., H. M. Brig "Pantaloon".
"The Luabo is the main outlet of the Great Zambesi. In the rainy season--January and February principally--the whole country is overflowed, and the water escapes by the different rivers as far up as Quilimane; but in the dry season neither Quilimane nor Olinda communicates with it. The position of the river is rather incorrect in the Admiralty chart, being six miles too much to the southward, and also considerably to the westward. Indeed, the coast from here up to Tongamiara seems too far to the westward. The entrance to the Luabo River is about two miles broad, and is easily distinguishable, when abreast of it, by a bluff (if I may so term it) of high, straight trees, very close together, on the western side of the entrance. The bar may be said to be formed by two series of sand-banks; that running from the eastern point runs diagonally across (opposite?) the entrance and nearly across it. Its western extremity is about two miles outside the west point.
"The bank running out from the west point projects to the southward three miles and a half, passing not one quarter of a mile from the eastern or cross bank. This narrow passage is the BAR PASSAGE. It breaks completely across at low water, except under very extraordinary circumstances. At this time--low water--a great portion of the banks are uncovered; in some places they are seven or eight feet above water.