The information, which later became known as the Auschwitz Protocols, were accounts compiled by prisoners who managed to escape and went to great length to alert the world about what was happening.
Two of the escaped prisoners -- Rudolf Vrba and Czeslaw Mordowicz -- later settled in Canada.
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From the November 27, 1944 edition of the Toronto Star, the earliest account I found in that paper of confirmation of the atrocities at Auschwitz.
Never let this happen again. Never.