" Wolfe nodded. “The letter-writer’s arrangement is even more adroit. Not only is there no risk of contact, there is no possible line of approach. But she must be found, and I have considered two procedures. One would be extremely expensive and might take many months. The other would require the cooperation of men who were close friends or associates of Mr. Valdon. From Mrs. Valdon’s suggestions four names were selected: yours. On her behalf I ask each of you to make a list of the names of all women with whom, to your knowledge, Richard Valdon was in contact during the months of March, April, and May, nineteen-sixty-one. Last year. All women, however brief the contact and regardless of its nature. May I have it soon? Say by tomorrow evening? "
― Rex Stout , The Mother Hunt (Nero Wolfe #38)