450 PROGRAMME, ^c. 
Tsaad, to Walet, Tischit, and even the coast of Guinea. 
He shall collect the most accurate itineraries he can pro- 
cure, and consult the best informed inhabitants upon 
that part of the course of the Dhioliba which he cannot 
see for himself. 
In observing the people, he shall take care to ex- 
amine their manners, ceremonies, customs, weapons, laws, * 
religion, food, diseases, the colour of their skin, the 
form of their face, the nature of their hair, and also the 
different articles of their commerce. It is desirable that 
he should form vocabularies of their idioms, compared 
with the French language ; finally, that he should make 
drawings of the details of their habitations, and take 
plans of the towns wherever it is possible to do so. 
