Later that night, he called for his physician Charles E. Sawyer, complaining of pain in the upper abdomen. Sawyer thought that it was a recurrence of stomach upset, but Dr. Joel T. Boone suspected a heart problem. The press was told Harding had experienced an "acute gastrointestinal attack" and his scheduled weekend in Portland was cancelled. He felt better the next day, as the train rushed to San Francisco, where they arrived the morning of July 29. He insisted on walking from the train to the car, and was then rushed to the Palace Hotel,[193][194] where he suffered a relapse. Doctors found that not only was his heart causing problems, but also that he had pneumonia, and he was confined to bed rest in his hotel room. Doctors treated him with liquid caffeine and digitalis, and he seemed to improve. Hoover released Harding's foreign policy address advocating membership in the World Court, and the president was pleased that it was favorably received. By the afternoon of August 2, Harding's condition still seemed to be improving and his doctors allowed him to sit up in bed. 