John Chamberlayne wrote to Hans Sloane about whether his Dutch was good enough to translate Leeuwenhoek's letters

Date: 
August 14, 1700

The date is New Style, which was eleven days ahead of the Old Style date of 3 August 1693 used by Chamberlayne in London.

Document: 

British Library, Sloane MS 4038, f. 41

Chamberlayne wrote to Sloane:

I will not deny Sir but there may be great many faults of my own in the translation having forgot a great deal of that Dutch which I acquired during my studies at Leyden, I beg the favour of you that Dr Miller may translate the same letter also, and then if you will confront us you'll understand it the better.