Henry Oldenburg wrote Letter L-027 to Leeuwenhoek acknowledging reciept of his letters
Date:
August 22, 1675
August 22 was the date in Holland when Oldenburg wrote this letter in London, where it was August 12.
Document:
This letter is known only by reference in L.’s reply. It is calendared as Letter 2724 in Hall and Hall, The Correspondence of Henry Oldenburg, vol. XI, May 1674–September 1675, p. 456.
Leeuwenhoek mentioned this letter at the beginning of Letter L-028 of 1675-12-20:
I received your honoured letter of August 12th in good order, from which I learned that you have received my letter of August 14th.
