That was the form of doubt he feared most. Impervious to fear! Often while walking abroad, when he happened also to come out of himself, he had such moments of dreadful and sane mistrust of mankind. What if nothing could move them? Such moments come to all men whose ambition aims at a direct grasp upon humanity—to artists, politicians, thinkers, reformers, or saints. A despicable emotional state this, against which solitude fortifies a superior character; and with severe exultation the Professor thought of the refuge of his room, with its padlocked cupboard, lost in a wilderness of poor houses, the hermitage of the perfect anarchist. In order to reach sooner the point where he could take his omnibus, he turned brusquely out of the populous street into a narrow and dusky alley paved with flagstones. On one side the low brick houses had in their dusty windows the sightless, moribund look of incurable decay—empty shells awaiting demolition. From the other side life had not departed wholly as yet. Facing the only gas-lamp yawned the cavern of a second-hand furniture dealer, where, deep in the gloom of a sort of narrow avenue winding through a bizarre forest of wardrobes, with an undergrowth tangle of table legs, a tall pier-glass glimmered like a pool of water in a wood. An unhappy, homeless couch, accompanied by two unrelated chairs, stood in the open. The only human being making use of the alley besides the Professor, coming stalwart and erect from the opposite direction, checked his swinging pace suddenly. “Hallo!” he said, and stood a little on one side watchfully. The Professor had already stopped, with a ready half turn which brought his shoulders very near the other wall. His right hand fell lightly on the back of the outcast couch, the left remained purposefully plunged deep in the trousers pocket, and the roundness of the heavy rimmed spectacles imparted an owlish character to his moody, unperturbed face. It was like a meeting in a side corridor of a mansion full of life. The stalwart man was buttoned up in a dark overcoat, and carried an umbrella. His hat, tilted back, uncovered a good deal of forehead, which appeared very white in the dusk. In the dark patches of the orbits the eyeballs glimmered piercingly. Long, drooping moustaches, the colour of ripe corn, framed with their points the square block of his shaved chin. “I am not looking for you,” he said curtly. The Professor did not stir an inch. The blended noises of the enormous town sank down to an inarticulate low murmur. Chief Inspector Heat of the Special Crimes Department changed his tone. “Not in a hurry to get home?” he asked, with mocking simplicity.