Inland Seas of Africa. 413 
“From Kazé, in inne ores a spot where the Arab traders 
have established a of mart, and where articles from the 
coast are barte iy for or ivor sib ale ves, the travellers moved 
romero until they reached the ors inland mass of water trend- 
ing from 8. to N., which has been styled Uniamesi and Ujiji, 
but the ran name of which is Diarra vik 
“This lake was found to be 1,800 feet only above the sea, or 
about half the average height of the plateau land west of the 
coast range. It has a length of about 300 and a breadth of from 
30 to 40 miles. 
his great internal mass of water was determined to be a 
Saye depression into which streams flow on all sides. Tt 
was crossed by Speke in the centre, and navigated conjointly 
tsetse = shen rod pe of the more orn ete African countries, in 
which Livingstone travelled, is unknow 
“A singular phenomenon of BLEhRneas sree for some time 
both the “tt vellers, Whilst exposed in the arid, hilly coast 
range, and also in vive plateau land, to a ered and glaring sun 
their sight was unaffected; but on descending into the verdant, 
well watered, and rich lacustrine expanse of Tanganyika their 
sight was dimmed, and gradually aot became almost blind— 
their Sane being slow and imperfect. It was this ban 
alone which diminished the number of astronomical observati 
m ide by Captain Speke, who lost no opportunity of fixing ‘he 
latitude and longitude of numerous positions. 
“When returned to their chief central station in Unyanyembé, 
Speke, thriving upon hard field work, left his invalid co companion - 
* Since this Address was dolixerete: ne Bri ite Museum has. acquired a curious, 
large, old Portugese MS. map of the ercator’s 
in 1623, which 
author distinct! y 
sar oe of Zanzi Although all t hp pve sersay probably 
ngo flow out of this lake to the west. rd: 
besi), which i same to the S§. ng Fa 
the so which is called R. de St, Yurzes, oat 
general notion of great i waters is there pu 
c 2 has recently discovered in an old MS. in the Royal Library at 
a in the year 1291, two Genoese navigators, dosio Doria and 
Ugolino Vivaldi, sailed for a down the West Coast of Africa. Their 
shi er Antonia and Allegranza, and the last-ment name has, 
in remained attached to the most northern of the Canary Islands. It has been 
€rroneously stated in some that these Genoese navigators sailed round the 
Cape of Good Hope.—June 20, 1859. 
