voters, agreeing with Roxas, ratified in a nationwide plebiscite the "parity amendment" to the 1935 Constitution of the Philippines, granting United States citizens the right to dispose of and utilize Philippine natural resources, or parity rights. Turtle and Mangsee Islands On September 19, 1946, the Republic of the Philippines notified the United Kingdom that it wished to take over the administration of the Turtle Islands and the Mangsee Islands. Pursuant to a supplemental international agreement, the transfer of administration became effective on October 16, 1947. Controversies His administration was marred by graft and corruption; moreover, the abuses of the provincial military police contributed to the rise of the left-wing (Huk) movement in the countryside. His heavy-handed attempts to crush the Huks led to widespread peasant disaffection. The good record of the Roxas administration was marred by notable failures: the failure to curb graft and corruption in the government (as evidenced by the surplus war property scandal), the Chinese immigration scandal, the school supplies scandal and the failure to check and stop the communist Hukbalahap movement. Assassination attempt The night before the plebiscite, Roxas narrowly escaped assassination by Julio Guillen, a disgruntled barber from Tondo, Manila, who hurled a grenade at the platform on Plaza Miranda immediately after Roxas had addressed a rally. Death On April 15, 1948, President Roxas delivered a speech before the United States Thirteenth Air Force at the Kelly Theater in Clark Air Base, Pampanga. After the speech, he suffered dizziness and fatigue and was brought to the residence of Major General Eugene L. Eubank. That night, he suffered multiple heart attacks and died at 9:23 PM at the age of 56. Roxas' term as president is the shortest, lasting 22 months and 18 days. His body was brought to Manila the following day on a special train, reaching Malacañang at about 9:20 AM. Sessions of Congress were suspended until after the burial which was set on Sunday, April 25, 1948. Vice President Elpidio Quirino, who was on board a southern cruise at the time of Roxas's death, arrived in Manila on April 17. That morning, he immediately went to Malacañang and took the oath of office as president in the Council of State Room. The new president then appointed a committee to take charge of the funeral arrangements for the late president and issued a proclamation declaring a period of national mourning from April 17 to