Letter, from Antoni van Leeuwenhoek to the Royal Society, dated at Delft Stating that he has received no reply from the Royal Society to letters he has sent; transcribes Christiaan Huygens' letter about the reproduction of eels; discusses the circulation of blood in eels; observations of mites; observations of the embryo of figs and of strawberries; observations of hairs on a lobster's leg No original figures; engraved figures for publication attached English translation see EL/L2/56 Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 11, p 301 Translated extract printed in 'Philosophical Transactions', vol 19, no 221, p 269 10 July 1696