British Intelligence Agent Paul Avery, alias Pawel Avorsky (1926-1964) worked undercover in Warsaw from 1956-1964. The discovery of Avery’s Warsaw Notebook beneath the floorboards of his former London home in September 1987 revealed that Avery had built a secret darkroom in the rafter portion of his apartment building, and later it was revealed that he had made an architectural model of the building to plan the darkroom's construction. A controversy erupted when a photographic print of what apears to depict a zeppelin crash, was found pasted in Avery's secret or unauthorized notebook. Avery re-photographed the military reconnaissance photograph with a concealed camera during a research visit to the National Photographic Interpretation Center (NPIC) in Leeds, England in 1961, where the original negative and a single print is held. Six weeks after the discovery of Paul Avery’s “Warsaw Notebook” in London, the Polish Secret Police found Avery’s darkroom intact. The Polish Communist Secret Police confiscated and documented everything.