ass of Years to be a Foundation for a general Rule.
Accordingly we see that almost fourscore Years have passed over without
any Calamity of this kind.

THE _Air_ of our Climate is so far from being ever the Original of the
true _Plague_, that most probably it never produces those milder
infectious Distempers, the _Small-Pox_ and _Measles_. For these Diseases
were not heard of in _Europe_ before the _Moors_ had entered _Spain_:
and (as I have observed in the _Preface_) they were afterwards
propagated and spread through all Nations, chiefly by means of the Wars
with the _Saracens_.

MOREOVER, we are so far from any Necessity of these periodical Returns
of the _Plague_, that, on the contrary, though we have had several
Strokes of this kind, yet there are Instances of bad _Contagions_ from
abroad being brought over to us, which have proved less malignant here,
when our _Northern Air_ has not been disposed to receive such
Impressions.

THE _Sweating Sickness_, before hinted at, called _Sudor Anglicus_ and
_Febris Ephemera Britannica_, because it was commonly thought to have
taken its Rise here, was most probably of a foreign Original: and though
not the common _Plague_ with _Glandular Tumors_, and _Carbuncles_, yet a
real _Pestilence_ from the same Cause, only altered in its Appearance,
and abated in its Violence, by the salutary Influence of our Climate.
For it preserved an Agreement with the common _Plague_ in many of its
_Symptoms_, as _excessive Faintness_ and _Inquietudes_, _inward
Burnings_, &c. these _Symptoms_ being no where observed in so intense a
Degree as here they are described to have been, except in the true
_Plague_: And, what is much more, it was likewise a _contagious_
Disease.

THE first time this was felt here, which was in the Year 1485, it began
in the Army, with which King _Henry_ VII. came from _France_ and landed
in _Wales_[61]: and it has been supposed by some to have been brought
from the famous Siege of _Rhodes_ by the _Turks_ three or four Years
before, as may be collected from what Dr. _Keyes_ says in one Place of
his Treatise on this Disease[62]. Besides, of the several returns which
this has made since that time, _viz._ in the Years 1506, 1517, 1528, and
1551, that in the Year 1528 may very justly be suspected to have been
owing to the common _Pestilence_, which at those times raged in
_Italy_[63] as I find one of our Historians has long ago
conjectured[64]: and the others were very proba