Lodewijk C. Palm 
Collected Letters of Antoni Van Leeuwenhoek – Volume 16 [PDF ebook] 

In volume XVI of The Collected Letters of Antoni van Leeuwenhoek, 25 letters of Van Leeuwenhoek have been included, all of them written from July 1707 to June 1712. The letters were written to six distinct addressees. The larger part was addressed to the Royal Society in London in general (sixteen letters); and to three of its fellows in particular