The accounts written by Langfus are considered one of the most important historical documents dealing with subject of the Sonderkommando in Auschwitz, and the Holocaust in general.
[citation needed] According to fellow prisoner Zalman Levental (whose diary was found in 1962), Langfus was one of the underground activists and planners of the revolt in the crematoria.
Eventually, historian Bernard Ber Mark (and his wife, after his death) - identified the works as being authored by Leib Langfus.
(One of the abbreviations - AJRA- was determined to stand for Aryeh Yehuda (his Hebrew first names) Regel Arucha (Long Foot)- which is the translation of the Yiddish/German "Langfus").
Stepping out of line to rebuke the SS officers for lying to them about their fate, Langfus addressed his fellow doomed prisoners:[10] "We should be alone, without a family, without relatives, without friends, without a place we might call our own, condemned to roam the world aimlessly.