The lamp had been lighted in the car, although it was not yet quite dark. Ned could see still as they whizzed along on some considerable elevation the wide spread of the city stretching in dusky undulations against the sky, which had now grown gray, portending rain. Beyond some dip, full of roofs, massive blocks of business houses rose, frowning and gloomy, while between surged smoke and dust in fantastic, haggard clouds that suggested witches and demons and undreamed-of powers of the air. The mazes of the telegraph and telephone wires now and then became visible, meshed and webbed about the town as if it were caught and held fast in the toils of some big scientific spider. Oh, it was a dreary evening,--long did Ned remember it! Even the most commonplace things had strange and sinister effects. The air was pulsing with rhythmic vibrations; the earth throbbed tumultuously; from a square railed inclosure in the middle of the street a column of black smoke gushed suddenly forth as if spewed from the pits of hell, and a locomotive was shrieking like a demon as it rushed out from the long tunnel beneath the avenue where the cable car rolled heavily on and on, its gong clamoring at every intersecting street, and now and again in a tumult of jarring warning lest some enterprising vehicle usurp the track. Once more Ned looked at the detective. The detective was looking at Ned. For that moment they understood each other. But the sharp boy of a town is no match for the sharp man of a town. The quiet personage in plain black clothes folded up his newspaper, put it in his breast pocket, then turning slightly in his seat, looked out of the window at the rows of decorous, even handsome residences which they were now passing. The gilded numbers were distinct upon the illuminated transoms, for within the gas was already lighted. He seemed to scan each with interest, as if he sought some particular number. Presently he rose, passed to the platform, quietly swung himself off, and walked slowly and meditatively to the sidewalk. Ned sat amazed as the progress of the car soon left him behind. He began to think that he had been mistaken from the first,--that he had neither been watched nor followed. The man had looked attentively at him to be sure,--but what of that? The white-haired gentleman of clerical aspect had also looked at him with interest. Ned felt quite certain now that influenced by his own secret anxiety he had magnified the danger, and fancied suspicion in every casual careless stranger. He was sure that he had encountered no detective.