The original manuscript on four quarto pages, written and signed by Leeuwenhoek, is preserved at the Royal Society (MS. 2087. L 4. 36).
Leeuwenhoek's self-publications are the source for the summaries of his 165 letters self-published and thus self-numbered letters. This letter was not among them.
Of the letters from April 4, 1702 (AB 237) through June 10, 1712 (AB 294), those letters with scientific observations, including this one, were all addressed to members of the Royal Society and almost all of them were excerpted in Philosophical Transactions.
The letter was read in the meeting of the Royal Society of 6 December 1710 0.S. (Royal Society, Journal Book Original, vol. II, p. 198).
A practically complete English translation of the letter was published in Philosophical Transactions no. 325 for January, February and March 1710, pp. 20-23, with 8 figures.
The manuscript of the translation on 4 folio pages is preserved in London at the Royal Society (MS 2088, L.4.37).
Observations upon the crystallized particles of silver dissolved in aqua fortis.
Original drawings of 8 figures are lost.
