“Why, Doctor, you’re jesting! You can’t suppose”—

“I don’t suppose anything. I simply want you to do it.”

“Well, I simply can’t!”

“Did you ever regret taking my advice, Richling?”

“No, never. But this—why, it’s utterly impossible! Me leave the results of four years’ struggle to go holidaying? I can’t understand you, Doctor.”

“’Twould take weeks to explain.”

“It’s idle to think of it,” said Richling, half to himself.

“Go home and think of it twenty-four hours,” said the Doctor.

“It is useless, Doctor.”

“Very good, then; send for Mary. Mail your letter.”