"Well, you wait a half a jiffy and we'll go up."
So David waited while the foreman took a paper out of his pocket.
And first he looked at the paper and then he looked at the pipes, and then he looked at the paper again.
Then he folded the paper and put it into his pocket, and he took David's hand and they went up the cellar stairs, and through a door into the kitchen.
There David saw the legs of two other men who were lying down under the sink.
They had a stump of a candle, too, for David could see its flickering light.
And there was a kind of a lamp out on the floor beyond, and it burned with a sputtering and a hissing and a roaring, and it threw a big bluish kind of a flame straight out, like water out of a hose.
David watched the men for nearly a minute without saying anything, but he couldn't guess what they were up to.
"What are they doing?" he asked at last.
"They're putting in the waste pipe and the trap," said the foreman; "but you don't know what that is, of course. They're putting in the pipe that the water runs through when it runs out of the sink."