and Temenggung was effected by a treaty of 19 November 1824, which was ratified by Calcutta on 4 March 1825. Between 1819 and 1826, Singapore was headed by two Residents of Singapore in succession, Maj.-Gen. William Farquhar and Dr. John Crawfurd. In 1826, Malacca, Penang and Singapore were amalgamated into the Straits Settlements, which were made a Crown colony with effect from 1 April 1867. The Colony was governed by a governor together with a legislative council. An executive council was introduced in 1877 by letters patent issued by the Crown, Composed of "such persons and constituted in such manner as may be directed" by royal instructions, it existed to advise the Governor and wielded no executive power. The Governor was required to consult the Executive Council on all affairs of importance unless they were too urgent to be laid before it, or if reference to it would prejudice the public service. In such urgent cases, the Governor had to inform the council of the measures he had taken. During the Second World War, the Japanese Empire invaded Southeast Asia, including Singapore and Malaya; the Japanese were victorious and set up their own government for a few years until 1945. Following the Second World War, the Straits Settlements were disbanded and Singapore became a Crown colony in its own right. The reconstituted Executive Council consisted of six officials and four nominated "unofficials". In February 1954, the Rendel Constitutional Commission under the chairmanship of Sir George William Rendel, which had been appointed to comprehensively review the constitution of the Colony of Singapore, rendered its report. Among other things, it recommended that a Council of Ministers be created, composed of three ex officio Official Members and six Elected Members of the Legislative Assembly of Singapore appointed by the Governor on the recommendation of the Leader of the House, who would be the leader of the largest political party or coalition of parties having majority support in the legislature. The recommendation was implemented in 1955. In the general election held that year, the Labour Front took a majority of the seats in the Assembly, and David Saul Marshall became the first Chief Minister of Singapore. Major problems with the Rendel Constitution were that the Chief Minister and Ministers' powers were ill-defined, and that the Official Members retained control of the finance, administration, and internal security and law portfolios. This led to confrontation between