This a an interesting piece of the history of the Second World War that is little known outside Denmark. It shows how heroism by some Danes (in particular Police Assistant Johannes Hansen & Lt. Cdr. Christiansen) in the occupied Danish island of Bornholm, provided British Intelligence with news about Hitler's new secret weapon, the prototype V1 flying bomb. At great risk to themselves & their families, they were able to get the report, Christiansen's detailed sketch & Hansen's photographs to Britain.