Edgar Kupfer-Koberwitz, a prisoner at Dachau

Edgar Kupfer-Koberwitz, a prisoner at Dachau, secretly recorded his experiences on more than 1,800 pages between November 1942 and October 1944, then buried the diary underneath a concrete floor. He survived, and his testimony was unearthed after the camp’s liberation.  (The New York Times, 9/4/20)