[1] He became involved in pro-independence and socialist activities as a student at Wojciech Górski Gymnasium in Warsaw.

[2] Dubois was a creator of the Red Scouts (Czerwone Harcerstwo Towarzystwa Uniwersytetu Robotniczego).

As an opponent of Sanation he was charged in 1930 with the communist agitation in Lwów and sentenced in the Brest trials for 3 years in prison.

[1] His great-grandfather, Charles August Dubois, was a French officer of Napoleon's Grande Armée.

He was arrested in 1940 in Warsaw and transported from the Pawiak prison to Auschwitz-Birkenau,[1] where he conspired with Witold Pilecki to gather intelligence inside the camp.