In his research for his biography of Dutch statesman François van 't Sant, Dutch author Sytze van der Zee discovered a letter from Van 't Sant to Queen Wilhelmina where he informed her that a date had been set for a coup to overturn the acting Dutch government. The letter gave the date for the coup as 24 April 1947. It also outlined some of the ministers to be appointed to serve in a new government. Erik Hazelhoff Roelfzema was listed as one of the men that could be relied upon. The coup never took place.