sentences:  The Polish government-in-exile in London learned about Auschwitz from the Polish leadership in Warsaw, who from late 1940 "received a continual flow of information" about the camp, according to historian Michael Fleming.This was in large measure thanks to Captain Witold Pilecki of the Polish Home Army, who allowed himself to be arrested in September 1940 and sent there.An inmate until he escaped in April 1943, his mission was to set up a resistance movement (ZOW), prepare to take over the camp, and smuggle out information about it.