"You wish to keep me—for yourself?" he repeated, laughing.
"Yes, Captain Selwyn."
"Until you marry. Is that it, Eileen?"
"Yes, until I marry."
"And then we'll let each other go; is that it?"
"Yes. But I think I told you that I would never marry. Didn't I?"
"Oh! Then ours is to be a lifelong and anti-sentimental contract!"
"Yes, unless you marry."
"I promise not to," he said, "unless you do."
"I promise not to," she said gaily, "unless you do."