igo ('Indigofera argentea', the common wild indigo of
Africa) is found growing every where, and large quantities of the
senna-plant* grow in the village of Tete and other parts, but neither
indigo nor senna is collected. Calumba-root, which is found in abundance
in some parts farther down the river, is bought by the Americans, it is
said, to use as a dye-stuff. A kind of sarsaparilla, or a plant which is
believed by the Portuguese to be such, is found from Londa to Senna, but
has never been exported.

* These appear to belong to 'Cassia acutifolia', or true senna
of commerce, found in various parts of Africa and India.--Dr.
Hooker.

The price of provisions is low, but very much higher than previous to
the commencement of the war. Two yards of calico are demanded for six
fowls; this is considered very dear, because, before the war, the same
quantity of calico was worth 24 fowls. Grain is sold in little bags made
from the leaves of the palmyra, like those in which we receive sugar.
They are called panjas, and each panja weighs between 30 and 40 lbs. The
panja of wheat at Tete is worth a dollar, or 5s.; but the native grain
may be obtained among the islands below Lupata at the rate of three
panjas for two yards of calico. The highest articles of consumption are
tea and coffee, the tea being often as high as 15s. a pound. Food is
cheaper down the river below Lupata, and, previous to the war, the
islands which stud the Zambesi were all inhabited, and, the soil being
exceedingly fertile, grain and fowls could be got to any amount. The
inhabitants disappeared before their enemies the Landeens, but are
beginning to return since the peace. They have no cattle, the only place
where we found no tsetse being the district of Tete itself; and the
cattle in the possession of the Portuguese are a mere remnant of what
they formerly owned.

When visiting the hot fountain, I examined what were formerly the
gold-washings in the rivulet Mokoroze, which is nearly on the 16th
parallel of latitude. The banks are covered with large groves of fine
mango-trees, among which the Portuguese lived while superintending the
washing for the precious metal. The process of washing is very laborious
and tedious. A quantity of sand is put into a wooden bowl with water;
a half rotatory motion is given to the dish, which causes the coarser
particles of sand to collect on one side of the bottom. These are
carefully removed with the hand, and the pr