and the sea, and partly on the lowest slopes of the hills 
themselves ; it is disposed roughly from north-east to south- 
west. 
The barracks for the main body of the garrison are on the 
hills rising behind and above the north-eastern end of the town. 
None of these barracks (of which there are three rising one 
above the other) are at a lower elevation than 400 feet, the 
lowest being those known as Tower Hill ; consequently, as one 
would naturally expect, they are comparatively healthy, most of 
the cases of fever that occur in them being probably contracted 
in the town. The case, however, is very differeni in the village 
of Wilberforce, which is situated some two miles away on a spur 
of the hills to the south-west of Freetown, at an altitude of 
about 700 feet. Here are temporary barracks, tenanted at the 
time of our visit by four companies of the 3rd West India 
Regiment. In spite of the increased elevation, fever was rife 
in these barracks, and, as will be shown later on, practically the 
whole of the subjects we used for examination and feeding 
mosquitoes, besides an almost constant supply of mosquitoes of 
the genus Anopheles, were obtained here. 
The village of Kissy, to be referred to almost immediately, is 
situated about three miles from Freetown, in the opposite 
direction to Wilberforce, on the lower slopes at the foot of 
the hills. 
The soil of Freetown is derived from a red laterite rock 
which crops out everywhere, even in most of the streets, many 
of which may be said to be paved with it. Un;ler the influence 
of the weather this rock readily wears into holes which become 
puddles in the rains. 
Since the streets of Freetown are very imperfectly drained, 
during the rainy season (at its height at the time of our visit ) a 
large amount of water is left standing in roadside puddles in 
most of the level parts of the town. In these localities, too, the 
streets are usually bordered on each side by a shallow, slowly 
flowing or nearly stagnant ditch. It is but lair to add that 
streets such as these are not inhabited by Europeans. In the 
parts of the town situated on the lowest flanks of the hills, 
where the streets have a considerable slope towards the sea, the 
bulk of the water runs swiftly oil* as soon as it falk while the 
