"You will see," said Mr. George.
Rollo looked up to the top of the smokepipe, which seemed to be considerably higher than the crown of the arch that the steamer was approaching. How it could possibly pass was a mystery. The mystery was, however, soon solved; for, at the instant that the bows of the steamer entered under the arch, two men, taking hold of levers below, turned the whole smokepipe back, by means of a hinge joint that had been made in it, not far from the deck. The hinge was in the back side of the smokepipe, and of course in bending the pipe back there was an opening made in front; and through this opening the smoke, while the steamer was passing through the bridge, came out in dense volumes. As soon, however, as the arch was cleared, the pipe was brought back into its place again by the force of great weights placed at the ends of the levers as a counterpoise. Thus the opening below was closed, and the smoke came out of the top of the pipe as before.
SHOOTING THE BRIDGE.
As soon as the boat had passed the bridge, Rollo, looking forward, saw another landing at a short distance in advance of them.
"Here comes another landing," said Rollo. "Is this the Westminster landing, do you think?"
"No," said Mr. George.
"How do you know?" asked Rollo.