Given name: Stach Family name: Unknown

Before the war, he was a member of the youth workers' movement. During the war, he was a member of an underground organisation. His work was to extract lime from a hole, where it was slaked, on one of the building areas in Praga.

Stach saved Goldstein's life. They worked together at a hole with slaked lime. Stach brought ill Goldstein medication (quinine) and food.