“I sometimes give recitals in the building at number 8 Narbutt Street in Warsaw where I carried bricks and lime – where the Jewish brigade worked: the men who were shot once the flats for German officers were finished. The officers did not enjoy their fine new homes for long. The building still stands, and there is a school in it now. I play to Polish children who do not know how much human suffering and mortal fear once passed through their sunny schoolrooms. I pray they may never learn what such fear and suffering are.”