You see, Mr.Theydon, we suspect nobody.

We try to ascertain facts, and hope to deduce a theory from them.

Over and over again we are mistaken.

We are no more astute than other men.

Our sole advantage is a wide experience of criminal methods.
The detective of romance--if you'll forgive the allusion--simply doesn't exist in real life." "I accept the rebuke," said Theydon.