xl 
ACCOUNT OF THE 
" 4tlily. The value of merchandize. This could only be 
done by comparing the articles with each other; with gold 
as a standard, and with European articles in exchange. 
"6thly, Profits of trade. This could be ascertained by 
bartering one African article for another ; an European 
article for an African, or an African or European article 
for gold. 
" Gthly. The extent to which such a commerce might 
be carried. This, by a careful and cautious comparison of 
the above, connected with habits of industry in the natives. 
" Mr. Park would likewise turn his attention to the 
general fertility of the country, whether any part of it might 
be useful to Britain for colonization, and whether any objects 
of Natural History, with which the natives are at present 
unacquainted, might be useful to Britain as a commercial 
nation. 
" Mr. Park would propose to himself the following sub- 
jects in conducting his geographical researches. 
1st. To ascertain the correct latitude and longitude of 
the different places he visits in going to the Niger. 
" 2dly. To ascertain, if possible, the termination of that 
river. 
" 3dly. To make as accurate a survey of the river as his 
situation and circumstances will admit of. 
4thly. To give a description of the different kingdoms 
on or near the banks of the river, with an account of the 
manners and customs of the inhabitants. 
