4i 
found in the interior of Africa. 
within my own observation, I am led to believe, that although 
many animals belonging to former ages may be extinct, they 
are not necessarily so ; no change having taken place in our 
globe, which had destroyed all existing animals, and there- 
fore many of them may be actually in being, although we 
have not been able to discover them. 
When we consider that the course of one of the greatest 
rivers in Africa, the Niger, has not been traced to its source 
by any European traveller, we must allow, that great tracts 
of country in that immense continent remain unexplored ; in 
which those animals, that are not disposed by their nature 
to submit to the will of man, but, on the contrary, to fly from 
him, may conceal themselves, by retiring into the wild fast- 
nesses of forests, which for ages to come may never be 
visited by rational beings. Under these circumstances, we 
have no right to assume that large animals, although not met 
with, do not exist. 
The following account of the migration of the animals in 
Africa, is in itself a curious document, and explains in what 
way particular animals may elude our enquiry at one time, 
and at another, be brought within our reach. 
Mr. Campbell says, “ he found that the wild ass, or quagga, 
migrates in winter from the ^tropics, to the vicinity of the 
Malaleveen river, which, though farther to the south, is re- 
ported to be warmer than within the tropic of Capricorn, 
when the sun has retired to the northern hemisphere. He 
saw bands of two or three hundred, all travelling south, when 
on his return from the vicinity of the tropic ; and various 
Bushmen, as he proceeded south, enquired if the quaggas 
were coming. Their stay lasts from two to three months, 
MDCCCXXII. G 
