“I may never be tried,” he answered. “You needn’t look startled. It isn’t suicide I am thinking of. Are you a Doctor?” He turned his fierce dark eyes upon me as he asked this last question.

“Yes; I am,” I answered.

“Then put your hand here,” he said, with a smile, motioning with his manacled wrists towards his chest.

I did so; and became at once conscious of an extraordinary throbbing and commotion which was going on inside. The walls of his chest seemed to thrill and quiver as a frail building would do inside when some powerful engine was at work. In the silence of the room I could hear a dull humming and buzzing noise which proceeded from the same source.

“Why,” I cried, “you have an aortic aneurism!”