454 THE AFRICAN ASSOCIATION. 
duct him to Tombuctoo, whither he might have 
gone in perfect safety. He confirmed every 
other part of that traveller's statement, with re- 
gard to his own adventures, and the course of 
the Niger as far as Tombuctoo. The route from 
Cabra, the port of Tombuctoo, to Butoo, the 
port of Houssa and Cashna, is given by him, 
though on report only, as follows. From Cabra 
to Agadez, a scattered negro town, the houses 
built with reeds and rushes, eight days ; thence 
to Humbri, fifteen days ; from Humbri to Bu- 
too, twenty or twenty-five days. Eastward of 
Butoo, the navigation of the river is interrupted 
by falls and cataracts, and little known ; but it 
is generally believed to be the Nile, or to fall into 
it. 
On the 17th November 1804, Mr Grey Jack- 
son, who had resided many years as a merchant 
at Mogadore, made a communication to Sir 
Joseph Banks, relative to Tombuctoo, derived 
from the information of persons who had visited 
or resided in that city. He declined mentioning 
their names, lest, in case of his return to Moga- 
dore, he should be found to have committed him- 
self by doing so. The substance of this letter 
was afterwards published, in an expanded form, 
as an appendix to Mr Jackson's description of 
the empire of Morocco. The information has 
evidently been collected somewhat loosely, but 
