descend the rivers until they reach a more favourable climate near
the sea-coast, or they can go to more elevated regions. But here
on the Amazon, where the only avenue of escape is the river itself,
throughout its length a hot-bed of disease where no change of climate
occurs, the time consumed in reaching the sea-coast is too long. The
cause of this disease, and its cure, are unknown. It manifests itself
through paralysis of the limbs, which begins at the finger-tips and
gradually extends through the system until the heart-muscles become
paralysed and death occurs.

The only precautionary measures available are doses of quinine and
the use of the mosquito-net, or _mosquitero_. The latter's value as
a preventive is problematical, however, for during each night one
is bound to be bitten frequently, yes, hundreds of times, by the
ever-present insects in spite of all.

But if we curse the mosquito, what are we to say of certain other
pests that add to the miseries of life in that out-of-the-way corner
of the globe, and are more persistent in their attentions than
even the mosquito? In the first place, there are the ants. They are
everywhere. They build their nests under the houses, in the tables,
and in the cracks of the floors, and lie in ambush waiting the arrival
of a victim, whom they attack from all sides. They fasten themselves
on one and sometimes it takes hours of labour to extract them. Many
are the breakfasts I have delayed on awaking and finding myself to
be the object of their attention. It proved necessary to tie wads
of cotton covered with vaseline to the fastenings of the hammock,
to keep the intruders off. But they even got around this plan. As
soon as the bodies of the first arrivals covered the vaseline, the
rest of the troops marched across them in safety and gained access to