There is a certain malady of the mind induced by too much of one thing. Just as the body fed too long upon meat becomes a prey to that horrid disease called scurvy, so the mind fed too long upon monotony succumbs to the insidious mental ailment which the West calls "cabin fever". True, it parades under different names, according to circumstances and caste. You may be afflicted in a palace and call it ennui, and it may drive you to commit peccadillos and indiscretions of various sorts.
