The stranger tried to guard the secret of his invisibility from the world by contriving all sorts of methods. Why did her then tweak Mr. Cuss’s nose so casually giving him solid evidence of his invisibility?

The stranger went about with his head swathed in bandages, eyes covered with enormous spectacles, hands gloved, coat collar pulled up and felt hat pulled down so that no one could detect his incivility. He stuck to his room during day time and left the house only in twilight to avoid unnecessary questions about his appearance. In his room too, he smoked with the lower part of his face wrapped in a silk muffler. He preferred to stay behind closed doors with blinds down. He did all this to guard the secret of the invisibility. However, when Cuss came to se him and asked if he was carrying out a long research, the stranger got very excited, giving vent to his pent up feeling, he pointed out towards the chimney while trying to explain how a very important prescription, absolutely vital to his research, had gone up in smoke. Cuss saw his handless empty sleeve and inquired from the stranger about this queer phenomenon. His insistence on knowing the reason behind the hollow sleeve compelled the stranger to disclose his so far well-guarded secret. Also, having aroused the suspicions of Cuss, the Stranger couldn’t care less about confirming doubts. Hence, he tweaked Cuss’s nose with his invisible finger and thumb partly to teach him a lesson for intruding hi privacy and partly to have fun.