Question: Why was the King of the United Kingdom coronation in June 1902 delayed?

Context paragraphs:
Samuel Whitside: Brigadier General Samuel M. Whitside was a United States Cavalry officer who served from 1858 to 1902.  He commanded at every level from company to department for 32 of his 43 years in service, including Army posts such a Camp Huachuca, Jefferson Barracks, and Fort Sam Houston, the Departments of Eastern Cuba and Santiago and Puerto Principe, Cuba, commanded a provisional cavalry brigade (consisting of the 10th and 5th Cavalry Regiments), a squadron in the 7th Cavalry Regiment, and a troop and platoon in the 6th Cavalry Regiment.  The pinnacle of his career was serving as the Commanding General of the Department of Eastern Cuba before retiring in June 1902 as a Brigadier General in the U.S. Army.

1902 State Landau: The 1902 State Landau is a landau open-topped horse-drawn carriage owned by the United Kingdom for royal use within Britain.  It is one of the several landau carriages used by the royal family.  It was built in 1902 for the coronation of King Edward VII and Queen Alexandra, and nowadays is most often seen during State visits conveying Elizabeth II and the visiting head of state to Buckingham Palace (or Windsor Castle) at the head of a procession of carriages.

1902 Coronation Honours: The 1902 Coronation Honours were announced on 26 June 1902, the date originally set for the coronation of King Edward VII.  The coronation was postponed because the King had been taken ill two days before, but he ordered that the honours list should be published on that day anyway.

Yasuhito, Prince Chichibu: Yasuhito, Prince Chichibu (秩父宮雍仁親王 , Chichibu-no-miya Yasuhito Shinnō , 25 June 1902 – 4 January 1953) , also known as Prince Yasuhito, was the second son of Emperor Taishō, a younger brother of the Emperor Hirohito and a general in the Imperial Japanese Army.  As a member of the Imperial House of Japan, he was the patron of several sporting, medical, and international exchange organizations.  Before and after World War II, the English-speaking prince and his wife attempted to foster good relations between Japan and the United Kingdom and enjoyed a good rapport with the British Royal Family.  As with other Japanese imperial princes of his generation, he was an active-duty career officer in the Imperial Japanese Army.  Like all members of the imperial family, he was exonerated from criminal prosecutions before the Tokyo tribunal by Douglas MacArthur.

King's South Africa Medal: The King's South Africa Medal is a British campaign medal which was awarded to all British and Colonial military personnel who served in the Second Boer War in South Africa, who were in the theatre on or after 1 January 1902 and who had completed 18 months service in the conflict prior to 1 June 1902.

Coronation cases: The Coronation cases were a group of appellate opinions in English law cases, all arising out of contracts that had been made for accommodation for viewing the celebrations surrounding the coronation of King Edward VII and Queen Alexandra, originally scheduled for 26 June 1902.  The King fell ill with appendicitis two days before the planned Coronation and it was postponed until 9 August.

Thomas Cook (English politician): Sir Thomas Russell Albert Mason Cook (12 June 1902 – 12 August 1970) was a Conservative Party politician in the United Kingdom.  He served as a Member of Parliament (MP) from 1931 to 1945.

Edward VII: Edward VII (Albert Edward; 9 November 1841 – 6 May 1910) was King of the United Kingdom and the British Dominions and Emperor of India from 22 January 1901 until his death in 1910.

1902 Colonial Conference: The Colonial Conference of 1902 followed the conclusion of the Boer War and was held on the occasion of the coronation of Edward VII.  As with the previous conference, it was called by Secretary of State for the Colonies Joseph Chamberlain who opened it on 30 June 1902.

John Rognes: John Ingebrigt Rognes (18 June 1902 – 30 July 1949) was a Norwegian military officer and Milorg pioneer.  During the occupation of Norway by Nazi Germany he organized early military resistance, along with Olaf Helset and Paal Frisvold.  In 1941 he fled to the United Kingdom, where he assumed a central position with the Norwegian Army in exile in Britain.

Supporting paragraphs: 1902 Coronation Honours Edward VII
Answer: the King had been taken ill