"Why, altogether about seven or eight feet square."
"Good, and what else?"
"Three bars of iron, from three to four feet long, and two inches square."
"I have just broken up an iron wicket; nothing can be better for you. What next?"
"Two strong hinges and a latch, so that I can open or shut an opening two feet square when I wish."
"A trap, you mean?"
"No, a valve."
"I don't understand what you can want with a valve."
"Never you mind; I know what I want."
"That's all right; you have only to choose; there's a heap of hinges. What's the next thing?"