Taken from The GHost of Blackwood Hall
Mrs. Putney looked at the jeweler. "I cannot speak in your presence," she said haltingly. "I was warned never to tell any man or woman of this matter."
"That's why brought you to a girl detective," the jeweler said quickly. You'll be breaking no confidences in telling Nancy everything."
Nancy Drew is eighteen (pretty much permanently.) She's only enough to vote, make porn, buy cigarettes, serve in the military, get married without parental consent, be thrown out of foster care - indeed, in some counties of Nevada she could work as a prostitute.
"Girl detective" ei yi yi!