( 774 ) 
the Anfvper of Dr Tyfon io the foregoing Letter 
of Dr Wallis, concerning M^ns feeding on 
Pie/h. 
London, J^n. i6. tyof. 
SIR, 
BEfore I return you my Anfvver to your obliging 
Letter, I mud beg Pardon that I have deterred it 
fo long : And do affure you, it was not for want of a 
jjuft Refpeft and Efteem ( which all the Learned World 
defervedly have had for fo long a time of your great 
worth) that occafioned this Delay: But other affairs, 
which it were needlefs to trouble you with. I ^do now 
give you my hearty Thanks for the honour you have 
done me therein : And our whole Faculty is no lefs 
obliged to you, for your fo early defending fo momen- 
tous a Doftrine, as that of the Circulation of the Bloody 
which, for fome time afterwards was fo warmly oppo- 
fed, both by our own Countrymen and Foreigners. I 
doubt not, had you continued thefe Studies, the force of 
fo great a Gef////j would have made as great difcoveries, 
as that you then defended 5 and (ince have done in the 
Mathematich^ whereby you would have demonftrated 
many important truths in our Faculty, which now are 
jeceived only as meer con jeftures. 
The Argument you propofe, from the Conformation 
Qf the Intefiines^ why Man (hould not be Carnivorous^ 
feems far more Rational than that wh ch Gaffendus 
urges, from the ftrufture ot the Teeth. Though it muft 
te owned, there is nothing he hath omitted, that coul4 
have been faid on that fubjed, to favour it. I fliali 
beg leave to give you my thoughts freely on this occa- 
