An interesting tip: hetillegaleparool.nl. This site offers an archive of the illegal publications in World War 2, Het Parool, one of the major illegal papers, and its precursor, the Nieuwsbrief van Pieter 't Hoen, which first appeared on 25 July 1940. It was the initiative of one man, who was responsible for the contents. The Nieuwsbrief was produced by a handful of individuals and distributed on a small scale. The Nieuwsbrief van Pieter 't Hoen became Het Parool in February 1941. Het Parool was written by a larger editorial team and was widely distributed throughout the country. It was published continuously from 10 February 1941 until the liberation.