John Chamberlayne wrote to Hans Sloane about whether his Dutch was good enough to translate Leeuwenhoek's letters
The date is New Style, which was eleven days ahead of the Old Style date of 3 August 1693 used by Chamberlayne in London.
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.