for which we find ourselves obligated to thank Your Noble, Most Honorable Ed: Ed: Groot Agtb: ships from the bottom of our hearts; since that time, we have endeavored to make ourselves more and more worthy of that favor: And so that all the world might be able to see that the method we strive to follow is worthy of Your Noble, Most Honorable ships' favor, we have decided to translate the book of Paul Portal, sworn Surgeon, and prominent Man-Midwife in Paris, into the Dutch language; containing a large number of Observations, in which there are very many proofs of how wholesome that Method is; and how often it can be the salvation of Mother and Child. We take the liberty of dedicating it to Your Noble, Most Honorable ships, as much as a proof of our owed gratitude as to protect it against all envy: Hoping thus that this Art, becoming more and more known among our countrymen, shall be for the benefit and salvation of many people, and we shall contribute to it with our modest talent as much as shall be in our power; being

Amsterdam the
23 Oct. 1689.

Noble, Most Honorable GENTLEMEN,