The P R E E A C E. 
tf this in the Jefuits Bark, which was eppojed hy Phyfici^ 
atjs from 1640. or t hereabouts, till about twenty years 
fincc : the Arguments ufed again/} it, were drawn from 
its being no alterer or voider of thofe Humours, which the 
mo (I part of Phyficians^ had then fettled by their Hypo- 
thefes to be the caufe of fuch Diflempsrs. A poor Indian 
■ who firfl taught the Cure of an Ague, of which the Lady 
of the Count de Chincon {Governor of Peru, in 1638.^ 
was Sickj overthrew with one fimple Medicine, without 
any preparation, all the Hypothefes, and Theories of 
Agues, which were fupported by fome Scores not to jay 
Hundreds of Volumes, and "^tis plain did mif chief by hin* 
dtring the advantage Men might have received fooner 
from fo innocent and beneficial a Remedy, 1 fay this not 
to repoach Phyfitians, who do well to be wary in the ufe of 
a, new Remedy, till Experience confirms it to be Harmlefs ; 
but be caufe there are fome Specifc Medicines mentioned in 
th'^eTranf anions for the Cure of other Difeafes, and more 
are defigned for the Jucceedtng Tear, I have mentioned 
the names of the Perfons from whom, and to whom Letters 
were fent, and the Circumflances of the fever al Relati- 
ons that came to m) Hands, that they may be either relied 
on, convlBed of falfhood, or further inquired into by thofe 
vrho defire to be better fatisjfed. More might have been faid 
of Books, hut I think that part fufficiently handled by others, 
and not fo material here, the Informations to be had in or*- - 
dtnary Extracis and Epitomes being not fo fatisfaBory to 
fi.nyTfho would hai^e'afuH knowledge of the Matters con- 
tained in the Berks thmfelves, the befl things being fome*- 
times left out according to the underflariding, fludies, or 
liking of the Abridger, I am forry fo many mifiakes 
happen in the Prefs, there \w ill ahays be fome y and theft 
Tr an factions have been the more incorreB for being done 
often in fuch haffie asnot to admit of a Revife, 
PHJL04 
