Leeuwenhoek did not publish any letters after 1718 in book form with his own summaries. The summary below comes from Alle de Brieven / Collected Letters.
In this cover letter, L. asks for support for his observations of hermaphroditic animals, which people find hard to believe. He follows up on the parcel of Philosophical Transactions that Jurin had sent him.
Signed autograph letter. The manuscript is to be found in London, Royal Society, Early Letters L.4.69; 2 quarto pages.
A contemporary English translation by James Jurin of the letter is to be found in London, Royal Society, Early Letters L.4.70; 1 page. This letter was not read at a meeting of the Royal Society.
