Ignace Reiss (1899 – 4 September 1937) – also known as "Ignace Poretsky,"[1] "Ignatz Reiss,"[2] "Ludwig,"[3] "Ludwik",[1] "Hans Eberhardt,"[4] "Steff Brandt,"[5] Nathan Poreckij,[6] and "Walter Scott (an officer of the U.S. military intelligence)"[7] – was one of the "Great Illegals" or Sovietspies who worked in third party countries where they were not nationals in the late 1920s and 1930s.[8] He was known as a nevozvrashchenec ("unreturnable").
An NKVD team assassinated him on 4 September 1937 near Lausanne, Switzerland, a few weeks after he declared his defection in a letter addressed to Joseph Stalin.[9][10] He was a lifelong friend of Walter Krivitsky; his assassination influenced the timing and method of Whittaker Chambers's defection a few months later.
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Poretsky, Elisabeth K. (1969). Our Own People: A Memoir of "Ignace Reiss" and His Friends. London: Oxford University Press. pp. 1–2 (Letter), 7–26 (Childhood), 27–36 (Polish Party), 37–52 (Lwow), 53–71 (Berlin/Vienna), 72-85 (Prague/Amsterdam), 86-129 (Moscow), 103-107 (Richard Sorge), 130-155 (Europe), 156-207 (Moscow), 208-226 (Switzerland), 243-270 (Afterward), 271-274 (Epilogue). LCCN70449412.
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Chambers, Whittaker (1952). Witness. New York: Random House. pp. 36 ("like rabbits from a burrow"), 47, 461. LCCN52005149.
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Massing, Hede (1951). This Deception. New York: Duell, Sloan and Pearce. pp. 98 et al. LCCN51002483.
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Krivitsky, Walter; Isaac Don Levine (1939). In Stalin's Secret Service. New York: Harper & Brothers. p. 252. LCCN40027004.
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Kern, Gary (2004). A Death in Washington: Walter G. Krivitsky and the Stalin Terror. Enigma Books. pp. Natan 80, Steff Brandt 122 and 438. ISBN978-1-929631-25-4.