On 16 November 1940, the Nazis sealed off a large section of central Warsaw, where they compelled all the Jews of the Polish capital to live. Over 400,000 people were cut off from the outside world in the ghetto, among them a 47-year-old school teacher who kept a record of the terrible events and conditions. Part of Abraham Lewin's diary, covering the period from April 1942 to January 1943, was found hidden in a milk churn after the war and is now published in English for the first time. This document, fit to rank with the accounts of Anne Frank and of Emanuel Ringelblum, is especially illuminating on how far the Jews were aware of their possible fate and on how they reacted to the threat of deportation to the death camps. Antony Polonsky's introduction and notes place the events in the history of the Warsaw Ghetto and the fate of Polish Jewry as a whole, and demonstrate how Lewin's diary is an important contribution to the knowledge of the Holocaust.