“Well, this kind of thing. For instance, if you found the ace, that is to say, if you fell tremendously in love, you might not care about the rest of the hand. If the adorable was in my bedroom, two windows off, and if she was locked in there, and if the house was on fire——”

“Any more ‘ifs’?” asked Peter.

“Not one. But supposing all these things, you would instantly get out on to that cornice, at peril of your life, and shuffle your way along it. You would have to be with her. You wouldn’t give two thoughts as to what might happen to you.”

Peter thought this over.

“I should be a consummate ass, then,” he remarked. “A fellow with a grain of sense would go down the passage and bash the door in.”

“But let’s pretend that for some reason you couldn’t. If the only way of reaching the room was along the cornice you would go.”

Peter looked at the ledge.

“And if I got there in safety, what then?” he asked. “I couldn’t carry her back along the ledge.”

“But that wouldn’t prevent your going,” said she. “Whatever the risk to yourself was, and however useless your going was, you would go.”

Peter was silent a moment, frowning.