The King's Achilles tendon was treated in January 1902, and then in June he found a "hard swelling in the abdomen". Treves did not remove the abscess, which was , and inflammation around the appendix which required draining. The coronation of the new king was scheduled for 26 June 1902, but on 24 June, Edward was diagnosed with appendicitis. Treves, with the support of the leading surgical authority, Lord Lister, performed a then-radical operation of draining the infected appendiceal abscess through a small incision and leaving the appendix intact. This was at a time when appendicitis was generally not treated operatively and carried a high mortality rate. The operation was carried out on a table in the Music Room at Buckingham Palace. The King had opposed surgery because of the upcoming coronation, but Treves insisted, stating that if he was not permitted to operate, there would instead be a funeral. The next day, Edward was sitting up in bed, smoking a cigar.