334 Concluding Remarks. 
demand would certainly produce a small but regular 
supply. 
The two staples of commerce are now repre¬ 
sented by palm-oil, which can be produced in quan¬ 
tities over the lowlands upon the whole river delta, 
and along the banks from the mouth to Boma, a 
distance of at least fifty direct miles. The second, 
and the more important, is the arachis, or ground¬ 
nut, which flourishes throughout the highlands of the 
interior, and which, at the time of my visit, was 
beginning to pay. As the experience of some 
thirty years on different parts of the West Coast 
has proved, both these articles are highly adapted 
to the peculiarities of the negro cultivator ; they 
require little labour, and they command a ready, a 
regular, and a constant sale. 
When time shall be ripe for a bona fide emigra¬ 
tion, the position of Boma, at the head of the delta, 
a charming station, with healthy air and delicious 
climate, points it out as the head-quarters. Houses 
can be built for nominal sums, the neighbouring 
hills offer a sanatorium, and due attention to diet 
and clothing will secure the white man from the 
inevitable sufferings that result from living near 
the lower course. 
With respect to the exploration of the upper 
stream, these pages, compared with the records of 
the “ First Congo Expedition,” will show the many 
changes which time has brought with it, and will 
