“A train containing 4,000 Jewish children, unaccompanied and without identification papers or even distinguishing marks, left Lyon(France) for ‘somewhere in Poland.’ The destination in Germany was known, both to the Times and to Churchill, only as ‘somewhere in Poland’. Their destination was in fact Auschwitz, although this was not known either in France or by the Allied nations…”
Source: Times of London September 7, 1942