I revisited 'The Black Book' (a famous work of atrocity propaganda from 1943) and ran across something. On page 158 of my pdf copy (page 122 of a physical copy), I found reference to jews from the Warsaw ghetto transited east and put to work. I will share the passage here;
2 transports of 4,000 people is more than none although I must admit, it is a bit short of the full number. I did mark it as strange that this mainstream accepted work hasn't been brought up before when people talk about transit through the camps, from the Warsaw Ghetto no less.About 25,000 Jews were deported from Lublin in sealed railway cars to an unknown destination and all trace of them was lost" [and] "of the 250,000 Jews deported from the Warsaw Ghetto up to September 1, 1942, only two small transports, numbering about 4,000 people, are known to have been sent eastwards in the direction of Brzesc and Malachowicze, allegedly to be employed on work behind the front lines. It was not possible to ascertain whether any of the other Jews deported from the Warsaw Ghetto still survive and it must be feared that they have been all put to death
I just figured I'd share this little tidbit and get everyone's thoughts on this.
https://archive.org/details/the-black-b ... jewry-1943
Edit: Changed link address