“The Spy”
![](https://audiotour.kazemattenmuseum.nl/wp-content/uploads/2021/12/2.-de-spion.jpg)
An illustration of a Lockheed Hudson with Jan Bockma on-board, above the Afsluitdijk, made by Dirk van Rijn.
Dozens, perhaps hundreds, of English planes crashed into IJssel Lake during the war. They were shot out of the sky by German anti-aircraft artillery or shot down in dogfights with German pilots. Many wrecks still lie on the seabed today. The wreck of a Lockheed Hudson was recovered in 1997. It was shot down on 6 July 1944 after its crew, four Dutch spies, were given away. One of the spies was Jan Bockma. His second cousin is in the museum and looking for his story.