DOPPELGANGER. It was late, he did not know or care how late. He was by no means familiar with this quarter of the city. He was agitated and angry, and did not wish to return to his hotel till he had a little walked off his excitement. Slowly he sauntered along, from street to street. These were old-fashioned, such as were in vogue in the days of the Regency. Tall houses, with gables facing the street; few of them showing any light from their windows, and their dark outlines discernible on high against the midnight sky. Now he heard the voices of people near, emerging from a low theatre in a street at the right. A number of men come along the trottoir, toward Uncle David. They were going to a gaming-house and restaurant at the end of the street, which he had nearly reached. This troop of idlers he accompanies. They turn into an open door, and enter a passage not very brilliantly lighted. At the left was the open door of a restaurant. The greater number of those who enter follow the passage, however, which leads to the roulette-room. As Uncle David, with a caprice of curiosity, follows slowly in the wake of this accession to the company, a figure passes and goes before him into the room. With a strange thrill he takes or mistakes this figure for Mr. Longcluse. He pauses, and sees the tall figure enter the roulette-room. He follows it as soon as he recollects himself a little, and goes into the room. The players are, as usual, engrossed by the game. But at the far side beyond these busy people, he sees this person, whom he recognises by a light great-coat, stooping with his lips pretty near the ear of a man who was sitting at the table. He raises himself in a moment more, and stands before Uncle David, and at the first glance he is quite certain that Mr. Longcluse is before him. The tall man stands with folded arms, and looks carelessly round the room, and at Uncle David among the rest. "Here," he thought, "is the man; and the evidence, clear and conclusive, and so near this very spot, now scattered in dust and fragments, and the witness who might have clenched the case impracticable!" This tall man, however, he begins to perceive, has points, and strong ones, of dissimilarity, notwithstanding his general resemblance to Mr. Longcluse. His beard and hair are red; his shoulders are broader, and very round; much clumsier and more powerful he looks; and there is an air of vulgarity and swagger and boisterous good spirits about him, certainly in marked contrast with Mr. Longcluse's very quiet demeanour. Uncle David now finds himself in that uncomfortable state of oscillation between two opposite convictions which, in a matter of supreme importance, amounts very nearly to torture.