“You are right,” said Asmodeus, “and were I now to show you the inner heart of the Duke of Medina y Barò who controls the police forces of Madrid, you would find that his chief anxiety in the distribution of his men came from the dilemma in which he perpetually finds himself, whether to furnish them rather in large numbers to the wealthier quarters for the defence of which policemen exist, or for the poorer quarters, the terrorising of which is necessarily their function.” “At any rate,” said the Student, “he need not bother himself about the houses of that large number of people (and I am one) from whom there is nothing to steal and who yet have never learnt any of the arts of theft. In a word, he is spared the trouble either of protecting or of keeping down what are called the middle classes.” “True,” said Asmodeus, “but most unfortunately this kind of person does not herd together in special districts. If they did so it would be a great relief to the strain upon the Police Department; but they are scattered more or less evenly throughout the wealthier and the poorer quarters.” “Can you tell me,” asked the Student, “whether it is worth our while to watch the policeman for a few moments in the exercise of his duties and whether he would provide us with any entertainment as we watched him unseen?” “Alas!” answered the Devil sadly, “I have no power to forecast the future; but from my knowledge of the past I can tell you that during the ten years since he has joined the force this officer has not once arrested a rich man in error on a dark night, nor perjured himself before a Magistrate so openly as to be detected, nor done any of those things which legitimately amuse us in people of his kind.” “But do you not think,” said the Student, “that we might by remaining here see him help an old woman across the road amid the plaudits of the governing classes, or take a little child that is lost by the hand and lead it to its mother’s home?” “Doubtless,” said the Devil, yawning, “we should find him up to tricks of that sort were we willing to wait here, floating in the air, for another ten or dozen hours, when the streets will be full of people. But the play-acting to which you so feelingly allude is but rarely indulged in by these gallant men when onlookers are wanting. Come, the sky is already pale in the direction of the eastern mountains; it will soon be day, and I desire before you are completely tired out to show you one more sight.” With these words Asmodeus took the Student by the hand and darted with inconceivable rapidity over the roofs of the city until he came to a particular spot which he had evidently marked in his flight. “Cast your eyes,” he said, “upon this narrow but busy thoroughfare beneath us. It is the only street in Madrid which at so late an hour is still full of people and of business. It is called Fleet Street.” “I have heard of it,” said the Student.