cribs for the Cryptanalysis of the Enigma used by other Abwehr networks. Sergueiew returned to France in late 1944, where she served in the French Women's Army Service. Later life After the war she wrote a revealing memoir, describing her former MI5 employers as "gangsters". Her memoirs, entitled Secret Service Rendered, were eventually published in 1968. While she was serving as a Russian language interpreter for Major John Barton Collings, the two fell in love and were married in Paris in 1946. At that time Collings was serving as the Military Governor of Erfurt, Germany, with responsibility for relocating the survivors of nearby Buchenwald, many of whom were Russians. Later they moved to Solon Township, MI, where Nathalie died on 17 May 1950 from kidney failure. References 1912 births 1950 deaths Abwehr Double-Cross System French people of Russian descent Journalists from Paris Emigrants from the Russian Empire to France Emigrants from the Russian Empire to the United States World War II spies for Germany World War II spies for the United Kingdom