PART I 
LEEUWENHOEK 
A very civil complesant man, & douptless 
of great natural Abileties; but contrary 
to my Expectations quite a stranger to 
letters, .. . which is a great hindrance 
to him in his reasonings uppon his Obser- 
vations, for being ignorant of all other 
Mens thoughts, he is wholy trusting to 
his own.—Dr Thomas Molyneux (1685). 
