"None whatever," said Jack.
"But it's going to stop rather sudden."
"How so?" said Jack.
"I mean the trains," said Ned. "That is, the cables. They're going to fetch up with a bang at the other end. At least, they would, if we hadn't thought of a way to prevent it. Because it wouldn't do to break the heads of all the passengers every time."
"No," said Jack. "That would be too much."
"Too much," said Ned. "And so you see the depot must be some sort of contrivance to let 'em off easy."
"Of course," said Jack.
"And the first thing anybody thinks of is a bowling-alley, and the pins flying every which way."
"Quite naturally," said Jack.
"And that makes you think of a soft mattress to stop them. But Fay thinks it would be better, on some accounts, to drop them into a big tank of water."