The Collegium Medicum consisted of doctors and apothecaries and oversaw the practice of medicine in Amsterdam. The second man from the left, apothecary Jeronimo de Bosch, is known to have supplied the medicine chest to the slave ship Leusden, which ran aground off Suriname in 1738. This shipwreck became infamous because sailors locked the hatches of the lower deck. Consequently, 664 West-African men, women and children were trapped inside and perished.