Wrote letter of 1712-06-10 (AB 294) to Members of the Royal Society
The original manuscript on six quarto pages, written and signed by Leeuwenhoek, is preserved at the Royal Society (MS. 2087. L 4. 46).
On the cover, Leeuwenhoek wrote, "for de Secretarij of the Roijall Societij at Gresham Colledge London".