Alex Petrie wrote to the Royal Society attesting to the number of little animals in Leeuwenhoek's infusions
Date:
August 30, 1677
Alex Petrie, pastor of the English Congregation in Delft, wrote in English to Royal Society. Leeuwenhoek sent a Dutch translation, too. "... that in so small a quantity of water I should see such vast number of those little animals."
Document:
Enclosures with letter #33. Collected Letters, vol. 2, pp 257-271.