Years of heavy labour in the Mauthausen quarry left him with rheumatism and inflamed nerves in his shoulders and arms , which hampered his efforts to practice his profession .
Following his release from the concentration camp , Heckmann struggled to regain a foothold as a professional musician .
Years of heavy labour in the Mauthausen quarry left Heckmann with rheumatism and inflamed nerves in Heckmann 's shoulders and arms , which hampered his efforts to practice his profession .
Following his release from the concentration camp , Heckmann struggled to regain a foothold as a professional musician .