This book is an important historical source originally written by a man who was an eyewitness
to the plague that killed 100 000 people between 1770 and 1772. Charles de Mertens was the
doctor to a foundling home. There is a limited account of this plague epidemic. It is not as
well-known as it should be due to politics at the time and a translation lag. Therefore this
book is an important source of primary information.