No land would be taken from any Arab, nor would the Moslem religion be touched in any way." The fourth congress, on 25 June 1921, voted to send a six-man delegation to London which left Palestine on 19 July 1921. After a short visit to Cairo, the delegation went to Rome where they were received in audience by Pope Benedict XV who expressed sympathy with their cause. The delegation (usually referred to as the Palestinian Arab or Muslim-Christian Delegation) arrived in London on August 8. Three members of the delegation went to Geneva and joined the Syrian–Palestinian Congress to put their case to the League of Nations and to protest the draft mandate. The president of the delegation was Musa Kazim al-Husseini. Its secretary was Shibli al-Jamal (Dr. Fu'ad Samad, assistant secretary) and the other 4 delegates were Tawfiq Hammad, Amin al-Tamimi, Ibrahim Shammas, Mu'in al-Madi. Three meetings with Churchill were had in August and other discussions and correspondence with Colonial Office officials along with meeting Weizmann in November all of which were fruitless since the delegation effectively wanted the policy abandoned altogether and the British were not prepared to countenance anything other than minor adjustments. Finally, the draft of the proposed Palestine constitution was sent to the delegation in February and their response marks the first document published in the white paper. The May 1921 riots in and around Jaffa were the subject of a report published on 1 October 1921, determining the main cause as being due to Arab discontent about Jewish immigration and perceived pro-Jewish bias by Mandatory authorities. Its remit was expanded to include looking into any recent disturbances in Palestine so also considered the unpublished Palin report into the April 1920 Jerusalem riots. The White paper was intended to address the issues that had been identified. On 3 June, 1921, Samuel made a speech (quoted from in paragraph 6 of the 1 March, 1922 document #2 of the white paper) which McTague describes as a necessary effort, after more than three years, to define the Balfour Declaration. As one author put it, quoting a 6 June 1920 report to the Foreign Office, "..what struck me most of all was that nobody seemed to know what the Zionist policy of His Majesty’s Government meant." Churchill quoted Samuel in the first full parliamentary debate of 14 June, 1921 on Palestine and wherein he defended the policy and the mandates arguing that it had all been agreed prior, it was important for Britain to keep its word and that provided immigration were properly regulated then that would benefit the economy.