dr. Livingstone's researches. 433 
green trees, standing close together, and inter- 
laced with great numbers of gigantic climbers. 
The trees covered with lichens, and the ground 
with mosses and ferns, indicate a much more 
humid climate than is to be found in the South. 
The only roads through these dense thickets 
are small winding footpaths ; and as an attempt 
to stop an ox suddenly only makes him rush 
on, we were frequently caught by the over- 
hanging climbers, and came to the ground head 
foremost. 
"The streams, with which the country is well 
supplied, differ remarkably in the directions in 
which they flow. Many were flowing South- 
wards ; but a distance of about twenty miles 
brought us to streams running ^North-east, and 
in much deeper valleys. I suspected that we 
were travelling on an elevated table land, be- 
cause the current of the Zambesi and other ri- 
vers was rapid, and we had large Cape heaths 
and rhododendrons, which grow on elevated 
positions, together with a wonderful lack of 
animal life. This proved to be the fact, for 
when we were about 40 miles E. S. E. of the 
Quango, we came upon a sudden descent, per- 
haps about 2000 feet, which to me seemed 
about the same height as Table Mountain at 
the Cape. Ninety or a hundred miles West 
from this descent, appeared as it were a range 
2 F 
