arrived in Palestine to investigate the reasons behind the uprising. The commission was charged with determining the cause of the riots, and judging the grievances of both sides. Chaim Weizmann made a speech on behalf of the Jews. On 25 November 1936, testifying before the Peel Commission, Weizmann said that there are in Europe 6,000,000 Jews ... "for whom the world is divided into places where they cannot live and places where they cannot enter." The Mufti of Jerusalem, Hajj Amin al-Husseini, testified in front of the commission, opposing any partition of Arab lands with the Jews. He demanded full cessation of Jewish immigration. Although the Arabs continued to boycott the Commission officially, there was a sense of urgency to respond to Weizmann's appeal to restore calm. The former Mayor of Jerusalem Ragheb Bey al-Nashashibi—who was the Mufti's rival in the internal Palestinian arena, was thus sent to explain the Arab perspective through unofficial channels. In 1981 it was disclosed that the Jewish Agency Executive Political Department had installed microphones in the room the commission was meeting and Ben Gurion was able to read transcripts of evidence held in camera. Conclusions The causes of the Arab rebellion that broke out in the previous year were judged to be The Commission found that the drafters of the Mandate could not have foreseen the advent of massive Jewish immigration, that they considered due to "drastic restriction of immigration into the United States, the advent of the National Socialist Government in Germany in 1933 and the increasing economic pressure on the Jews in Poland." They wrote that "The continued impact of a highly intelligent and enterprising race, backed by large financial resources, on a comparatively poor indigenous community, on a different cultural level, may produce in time serious reactions." The Commission found that "though the Arabs have benefited by the development of the country owing to Jewish immigration, this has had no conciliatory effect. On the contrary, improvement in the economic situation in Palestine has meant the deterioration of the political situation". Addressing the "Arab charge that the Jews have obtained too large a proportion of good land cannot be maintained", the Commission noted that "Much of the land now carrying orange groves was sand dunes or swamp and uncultivated when it was purchased." They write that "The shortage of land is, we consider, due less to the amount of land acquired by