would not send them. I told Mohamad bin Saleh, and he
said to Thani that he and I were men of the Government, and orders had
come from Syed Majid to treat me with all respect: was this conduct
respectful? Thani then sent for the packet, but whether it will reach
Zanzibar I am doubtful. I gave the rent to the owner of the house and
went into it on 31st May. They are nearly all miserable Suaheli at
Ujiji, and have neither the manners nor the sense of Arabs.

[We see in the next few lines how satisfied Livingstone was concerning
the current in the Lake: he almost wishes to call Tanganyika _a river_.
Here then is a problem left for the future explorer to determine.
Although the Doctor proved by experiments during his lengthy stay at
Ujiji that the set is towards the north, his two men get over the
difficulty thus: "If you blow upon the surface of a basin of water on
one side, you will cause the water at last to revolve round and round;
so with Tanganyika, the prevailing winds produce a similar
circulation.". They feel certain there is no outlet, because at one time
or another they virtually completed the survey of the coast line and
listened to native testimony besides. How the phenomenon of sweet water
is to be accounted for we do not pretend to say. The reader will see
further on that Livingstone grapples with the difficulty which this Lake
affords, and propounds an exceedingly clever theory.]

Tanganyika has encroached on the Ujiji side upwards of a mile, and the
bank, which was in the memory of men now living, garden ground, is
covered with about two fathoms of water: in this Tanganyika resembles
most other rivers in this country, as the Upper Zambesi for instance,
which in the Barotse country has been wearing eastwards for the last
thirty years: this Lake, or river, has worn eastwards too.

_1st June, 1869._--I am thankful to feel getting strong again, and wish
to go down Tanganyika, but cannot get men: two months must elapse ere we
can face the long grass and superabundant water in the way to Manyuema.

[Illustration: Lines of Green Scum]

The green scum which forms on still water in this country is of
vegetable origin--confervae. When the rains fall they swell the lagoons,
and the scum is swept into the Lake; here it is borne along by the
current from south to north, and arranged in long lines, which bend from
side to side as the water flows, but always N.N.W. or N.N.E., and not
driven, as here, by the winds, as