'A throbbing vein,' said Dr. Gilbert soothingly, 'is the mother of delusion.''Then how do you account for my knowing when the thing is due?' Conroy's voice rose almost to a break.'Of course, but you should have consulted a doctor before using--palliatives.''It was driving me mad. And now I can't give them up.'''Not so bad as that! One doesn't form fatal habits at twenty-five. Think again. Were you ever frightened as a child?''I don't remember. It began when I was a boy.''With or without the spasm? By the way, do you mind describing the spasm again?''Well,' said Conroy, twisting in the chair, 'I'm no musician, but suppose you were a violin-string--vibrating--and some one put his finger on you? As if a finger were put on the naked soul! Awful!'