Mr. George and Rollo had to stand several minutes on the curbstone of the sidewalk before they could find openings, in the trains of vehicles which were moving to and fro over the bridge, wide enough to allow them, to pass through to the other side. At length, however, they succeeded in getting across; and, after walking along on the upper side of the bridge for some distance farther, until they had nearly reached the London end of it, they stopped and looked over the parapet down to the water. Of course their faces were now turned _up_ the river, and the view which presented itself was entirely different from that which had been seen below. Immediately beneath where they were standing, and close in to the shore of the river, they witnessed a most extraordinary spectacle, which was formed by a group of small and smoky-looking steamers, that were hovering in apparent confusion about a platform landing there. The decks of the steamers were all crowded with passengers. Some of the boats were just coming to the land, some just leaving it, and others were moored to the platform, and streams of passengers were embarking or disembarking from them. The landing consisted of a floating platform, that was built over great flat-bottomed boats, that were moored at a little distance from the bank, so as to rise and fall with the tide. There was a strong railing along the outer edge of the platform, with openings here and there through it for passage ways to the boats. Behind, the platforms were connected with the shore by long bridges, having a little toll house at the outer end of each of them, with the words, "PAY HERE," inscribed on a sign over the window. The passengers, as they came down from the shore, stopped at these toll houses to pay the fare for the places to which they wished to go. The decks of the steamers, the platforms, and all the bridges were thronged with people, going and coming in all directions, and crowding their way to and from the boats; and every two or three minutes a steamer, having received its load, would push off from the platform, and paddle its way swiftly up the river among a multitude of others that were shooting swiftly along, in all directions, over the water. The volumes of dense, black smoke which rolled up from the funnels of the steamers made the atmosphere very thick and murky; and the whole scene, as Mr. George and Rollo looked down upon it from the parapet above, for a time seemed almost to bewilder them. "Let us go down and take a sail in one of those steamers," said Mr. George. "Where do they go to?" said Rollo. "I don't know," said Mr. George. "Well," said Rollo, "let us go." So saying, Mr. George and Rollo walked on towards the end of the bridge. Here they found a broad stone staircase, which turned off from the great thoroughfare, at a place near the corner of a large stone building. The staircase was very broad and massive, and was covered with people going up and coming down.