"The objects which Mr. Park would constantly keep in view are, _the
extension of British Commerce, and the enlargement of our Geographical
Knowledge_.

"In directing his enquiries with respect to commerce, he would propose
to himself the following subjects as worthy of particular investigation.

"1st. The route by which merchandize could be most easily transported to
the Niger. This would be accomplished by attending to the nature of the
country, whether wooded or open; having water or not, being abundant in
provisions, or otherwise, and whether capable of furnishing the
necessary beasts of burden.

"2dly. The safety or danger of that route. This, by considering the
general character of the natives, their government, &c.; the jealousies
that European merchants would be likely to excite, and the guard that
would be necessary for the protection of the caravan.

"3dly. The return of merchandize. This by making out lists of such
articles as are produced in each district, and of such as are imported
from the neighbouring kingdoms.

"4thly. 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.

"5thly. 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.