Read it through once

“As I expected,” he murmured, with that hissing inspiration of his which meant so much. Without a word he went and locked the door, and then began to set out on the little table the instruments for yet another operation of transfusion of blood. I had long ago recognised the necessity, and begun to take off my coat, but he stopped me with a warning hand. “No!” he said. “To-day you must operate. I shall provide. You are weakened already.” As he spoke he took off his coat and rolled up his shirt-sleeve.