83 
LIFE OF UNNjEIFS. 
From Harderwyck he passed on to 
Leyden. Taking up his abode there 
for some time, he formed an acquain¬ 
tance with many celebrated scientific 
men; and, encouraged by their appro¬ 
bation of his views, published his first 
work, the Systema Natures. 
Among the advantages arising from 
the publication of this volume, it served 
to draw on him the notice of the great 
physician and botanist, Boerhaave; at 
that time so celebrated a person, as to 
have received a letter from China with 
this address simply, “ a Pillustre Boer- 
haave, Medecin en Europe.” 
So numerous and important were the 
visiters of various nations who sought 
his acquaintance, that he bad often as 
crowded a levee as if he had held a 
little court; and ambassadors, princes, 
and even so powerful a monarch as 
Peter the Great, had been obliged to 
