“What then? Sam Hardock and the engineer explained it simply enough. The beam is to have a little standing-place on it at every eighteen feet.”
“Yes, I understand that, and it’s to be attached to an engine lever which will raise it eighteen feet, and then lower it eighteen feet.”
“Of course. Well, what’s the good of pretending you did not understand?”
“I didn’t pretend; I don’t understand.”
Gwyn laughed.
“You are a fellow! There’ll be a ledge for a man to stand on, all down the beam from top to bottom exactly opposite the regular platform.”
“Yes, I understand that.”
“Well, then, what is it you don’t understand?” cried Gwyn, smiling.
“How it works.”
“Why, you said you did just now. Oh, I say, Jolly-wet, what a foggy old chap you are. You said as plain as could be, that the beam rose and fell eighteen feet.”