“This is a special case. Mr. Goodwin brought you in to me, and he is my trusted and highly valuable assistant, and he would be disappointed if I didn’t explore your affair thoroughly and let him take it down and type it.” Wolfe favored me with a hypocritical glance and returned to Pete. “So much for your ego and your fees. As for your methods, they must of course be suited to your field. I pass over such fields as industrial espionage and divorce evidence and similar repugnant snooperies, since the ego of any man who engages in them is already infested with worms, and so you are not concerned. But take robbery. Say, for instance, a woman’s jewel box has been looted, and she doesn’t want to go to the police because she suspects-”
“Let’s take murder. I’d rather start with murder.”
“As you will.” Wolfe was gracious. “You’re getting this, are you, Archie?”
“You bet. With my tongue out.”
“Good. But robbery or murder, no matter what, speaking generally, you must thoroughly understand that primarily you are practicing an art, not a science. The role of science in crime detection is worthy, honorable, and effective, but it has little part in the activities of a private detective who aspires to eminence. Anyone of moderate capacity can become adept with a vernier caliper, a camera, a microscope, a spectrograph, or a centrifuge, but they are merely the servants of detection. Science in detection can be distinguished, even brilliant, but it can never replace either the inexorable march of a fine intellect through a jungle of lies and fears to the clearing of truth, or the flash of perception along a sensitive nerve touched off by a tone of a voice or a flicker of an eye.”
“Excuse me,” I interposed. “Was that ‘a tone of voice’ or ‘a tone of