CASE 1.—T. R., a boy, aged 10 years, was seen on March 7, 1930, with an inflammation around the scar left by a simple operation on the right mastoid, which I had performed eight years previously. Three days later the scar was reopened at the lower angle, and the mastoid cavity was drained. As this simple procedure did not prove sufficient, on March 22 a secondary operation on the mastoid was performed. While the patient was in the hospital, he complained of a severe, paroxysmal right frontal pain. At first the attacks of pain were about six hours apart; gradually the interval became shorter. An effort to obtain relief by the use of sedatives was made.
Ten days after the secondary operation on the mastoid, the pain was increasing, and the patient began to complain of double vision with the right eye. He did not show strabismus. During the next