What you do in this world is a matter of no consequence. The question is, what can you make people believe that you have done.
You know a conjuror gets no credit when once he has explained his trick, and if I show you too much of my method of working, you will come to the conclusion that I am a very ordinary individual after all.
They say that genius is an infinite capacity for taking pains. It’s a very bad definition, but it does apply to detective work.
There is no satisfaction in vengeance unless the offender has time to realise who it is that strikes him, and why retribution has come upon him.
There is no branch of detective science which is so important and so much neglected as the art of tracing footsteps.
So all life is a great chain, the nature of which is known whenever we are shown a single link of it.