“But I shall be married long before that,” she pouted.

“Which will be your good fortune, my dear. And, now, good night. And you are not angry with me?”

She smiled pathetically and shook her head, put up her lips to be kissed, then said as they parted:

“I promise not to be angry if you will only show me the way that in the end will lead me to ancient graybeards like you and Graham.”

Dick Forrest, turning off lights as he went, penetrated the library, and, while selecting half a dozen reference volumes on mechanics and physics, smiled as if pleased with himself at recollection of the interview with his sister-in-law. He was confident that he had spoken in time and not a moment too soon.