92 TRAVELS THROUGH LOWER CANADA : 
is deemed, in tlie country/one of the most cer¬ 
tain preventatives against the disorder, and few 
that take it in time, regularly, and avoid the 
evening dews, suffer from it. 
Not only the town of Niagara and its vici¬ 
nity are unhealthy places, but almost every 
part of Upper Canada, and of the territory of 
the States bordering upon the lakes, is likewise 
unhealthy. The sickly season commences about 
the middle of July, and terminates about the 
first week of September, as soon as the nights 
become cold. Intermittent fevers are the most 
common disorders ; but in some parts of the 
country the inhabitants suffer from continual 
fevers, of which there are different kinds, pecu¬ 
liar to certain districts. In the country, for 
instance, bordering upon the Genesee River, 
which falls into Lake Ontario on the southern 
side, a fever is common amongst the inhabit¬ 
ants of a malignant nature, vulgarly called 
the Genesee fever, of which many die annually: 
and in that bordering upon the Miami River, 
which falls into Lake Erie, within the north¬ 
western territory of the United States, a fever 
of a different kind, again, is common. It does 
not appear that the exact nature of these dif¬ 
ferent fevers has ever been accurately ascer¬ 
tained. In the back parts of North America, 
in general, medical men are rarely to be met 
