water pipe

He must have climbed out of his window, and come down the water-pipe, as he did one day last summer.

A quick movement up the water-pipe, and his knee rested on the roof.

Then he would trot softly back, shoot up the water-pipe once more, and so to bed.

The wind had dropped, and in that funnel of ground every least noise and movement reached them like whispers up a water-pipe.