Regarding the fiasco in Holland, reccomend "London calling North Pole" by Hermann Giskes, the Abwehr mastermind, and "Inside North Pole" by Peter Dourlein, a Dutch agent who ,after arrest, escaped via Switzerland and Spain, only to find himself suspected of treason when he got back to London. A story of incompetence or betrayal-no-one will ever know. A lot of SOEs files were lost in a fire about 1945/6 -conspiracy theory here?-and , as a previous poster says, some are still closed.As for the Dutch ones, rumours at the time and since involved people in high places, so not surprising that they are still closed . (Dear moderator, please feel free to delete last para.)