The old lady grasped the parapet above, and there was a moment of intense struggle.

“Urup!” said Mr. Polly. “Hold on! Gollys! where’s she gone to?...”

Then an ill-mended, wavering, yet very reassuring spring side boot appeared for an instant.

“Thought perhaps there wasn’t any roof there!” he explained, scrambling up over the parapet beside her.

“I’ve never been out on a roof before,” said the old lady. “I’m all disconnected. It’s very bumpy. Especially that last bit. Can’t we sit here for a bit and rest? I’m not the girl I use to be.”

“You sit here ten minutes,” shouted Mr. Polly, “and you’ll pop like a roast chestnut. Don’t understand me? Roast chestnut! Roast chestnut! Pop! There ought to be a limit to deafness. Come on round to the front and see if we can find an attic window. Look at this smoke!”

“Nasty!” said the old lady, her eyes following his gesture, puckering her face into an expression of great distaste.

“Come on!”

“Can’t hear a word you say.”

He pulled her arm. “Come on!”