But notwithstanding that longevity is uncommon among them, it appeared to
me, that their diseases are but few in number. Their simple diet, and
active way of life, preserve them from many of those disorders which
embitter the days of luxury and idleness. Fevers and fluxes are the most
common, and the most fatal. For these, they generally apply saphies to
different parts of the body, and perform a great many other superstitious
ceremonies; some of which are, indeed, well calculated to inspire the
patient with the hope of recovery, and divert his mind from brooding over
his own danger. But I have sometimes observed among them a more
systematic mode of treatment. On the first attack of a fever, when the
patient complains of cold, he is frequently placed in a sort of vapour.
This is done by spreading branches of the _nauclea orientalis_ upon hot
wood embers, and laying the patient upon them, wrapped up in a large
cotton cloth. Water is then sprinkled upon the branches, which descending
to the hot embers, soon covers the patient with a cloud of vapour, in
which he is allowed to remain until the embers are almost extinguished.
This practice commonly produces a profuse perspiration, and wonderfully
relieves the sufferer.

For the dysentery, they use the bark of different trees reduced to
powder; and mixed with the patient's food; but this practice is in
general very unsuccessful.

The other diseases which prevail among the Negroes are the _yaws_, the
_elephantiasis_, and a _leprosy_ of the very worst kind. This last
mentioned complaint appears, at the beginning, in scurfy spots upon
different parts of the body, which finally settle upon the hands or feet,
where the skin becomes withered, and cracks in many places. At length,
the ends of the fingers swell and ulcerate, the discharge is acrid and
foetid; the nails drop off, and the bones of the fingers become carious,